Blood Circulation in Insect Wings

1964 ◽  
Vol 96 (1-2) ◽  
pp. 98-98 ◽  
Author(s):  
J. W. Arnold
Keyword(s):  
Blood Circulation ◽  
The Body ◽  
Insect Wings ◽  
Wing Structure ◽  
Wing Veins ◽  
Taxonomic Groups ◽  
Modified Forms ◽  
Surrounding Membrane

Despite their inert appearance, the wings of insects are living appendages and are supplied with blood. This is true for definitive wings as well as for developing ones, and for modified wings such as tegmina, elytra, hemelytra, and halteres as for those that are specialized for flight. Typically the blood circulates only through the wing veins, but in some insects it escapes into the surrounding membrane in certain areas, and in highly modified forms it may be entirely unconfined. The course of circulation is basically the same in the wings of most insects. It flows outward from the body in the costo-medial veins, moves toward the posterior margins via cross-veins, and returns to the body through the cubito-anal veins and axillary cord. However, rhe precise route followed is highly variable concomitant with distinctive patterns of venation in different taxonomic groups and with wing structure. This is illustrated for a number of orders.

Hypothetical Role of Growth Factors to Reduce Intervertebral Disc Degeneration Significantly through Trained Biological Transformations

2020 ◽  
Vol 26 ◽  
Author(s):  
Cristian Muresanu ◽  
Siva G. Somasundaram ◽  
Sergey V. Vissarionov ◽  
Liliya V. Gavryushova ◽  
Vladimir N. Nikolenko ◽  
...  
Keyword(s):  
Growth Factors ◽  
Blood Circulation ◽  
Seminal Fluid ◽  
Prostate Gland ◽  
The Body ◽  
Personal Experiences ◽  
Biological Transformation ◽  
The Mind

Background: From the evidence of failed injection-based growth factor therapies, it has been proposed that a naturally triggered uninterrupted blood circulation of the growth factors would be superior. Objective: We seek to stimulate discussions and more research about the possibility of using the already available growth factors found in the prostate gland and endometrium by starting a novel educable physiology, known as biological transformations controlled by the mind. Methods: We summarized the stretch-gated ion channel mechanism of the cell membrane, and offer several practical methods that can be applied by anyone, in order to stimulate and enhance the blood circulation of the growth factors from the seminal fluid to sites throughout the body. This details the practical application of our earlier published studies about biological transformations. Results: A previously reported single-patient case study has been extended, adding more from his personal experiences continually improving this novel physiological training and extending the ideas from our earlier findings in detail. Conclusion: The biological transformation findings demonstrate the need additional research to establish the benefits of these natural therapies to repair and rejuvenate tissues affected by various chronic diseases or aging processes.

Pressure cycles and the water economy of insects

1988 ◽  
Vol 318 (1190) ◽  
pp. 377-407 ◽  
Keyword(s):  
Body Temperature ◽  
Water Exchange ◽  
Vapour Phase ◽  
The Body ◽  
Tracheal System ◽  
Water Economy ◽  
Insect Wings ◽  
Pressure Cycle ◽  
Respiratory Gases

Water exchange between insects and their environment via the vapour phase includes influx and efflux components. The pressure cycle theory postulates that insects (and some other arthropods) can regulate the relative rates of influx and efflux of water vapour by modulating hydrostatic pressures at a vapour-liquid interface by compressing or expanding a sealed, gas-filled cavity. Some such cavities, like the tracheal system, could be compressed by elevated pressure in all or part of the haemocoele. Others, perhaps including the muscular rectum of flea prepupae, could be compressed by intrinsic muscles. Maddrell Insect Physiol . 8, 199 (1971)) suggested a pressure cycle mechanism of this kind to account for rectal uptake of water vapour in Thermobia but did not find it compatible with quantitative information then available. Newer evidence conforms better with the proposed mechanism. Cyclical pressure changes are of widespread occurrence in insects and have sometimes been shown to depend on water status. Evidence is reviewed for the role of the tracheal system as an avenue for net exchange of water between the insect and its environment. Because water and respiratory gases share common pathways, most published findings fail to distinguish between the conventional view that the tracheal system has evolved as a site for distribution and exchange of respiratory gases and that any water exchange occurring in it is generally incidental and nonadaptive, and the theory proposed here. The pressure cycle theory offers a supplementary explanation not incompatible with evidence so far available. The relative importance of water economy and respiratory exchange in the functioning of compressible cavities such as the tracheal system remains to be explored. Some further implications of the pressure cycle theory are discussed. Consideration is given to the possible involvement of vapour-phase transport in the internal redistribution of water within the body. It is suggested that some insect wings may constitute internal vapour-liquid exchange sites, where water can move from the body fluids to the intratracheal gas. Ambient and body temperature must influence rates of vapour-liquid mass transfer. If elevated body temperature promotes evaporative discharge of the metabolic water burden that has been shown to accumulate during flight in some large insects, their minimum threshold thoracic temperature for sustained flight may relate to the maintenance of water balance. The role of water economy in the early evolution of insect wings is considered. Pressure cycles might help to maintain water balance in surface-breathing insects living in fresh and saline waters, but the turbulence of the surface of the open sea might prevent truly marine forms from using this mechanism.

How Dead Can You Be?

1975 ◽  
Vol 15 (2) ◽  
pp. 133-146 ◽  
Author(s):  
Adrienne Van Till-D'Aulnis de Bourouill
Keyword(s):  
Brain Function ◽  
Blood Circulation ◽  
Artificial Respiration ◽  
The Body ◽  
Life And Death ◽  
The Public ◽  
Current Usage ◽  
Anglo American ◽  
Legal Security ◽  
Carotid And Vertebral Arteries

Life and death are defined in terms of function. Four groups of abnormal cases of death are specified and differentiated from normal cases. Murder, active euthanasia and cessation of artificial respiration are differentiated on the basis of the interested party, the cause of death and the purpose of the act. Juridical acceptance of this differentiation and terminology makes cessation of artificial respiration lawful, provided the patient had validly refused this treatment or is irreversibly comatose and also respirator-dependent. This would make it unnecessary to redefine death in terms of coma in order to solve legal and practical problems. Such a redefinition is against current usage (coma presumes life) and is the first step on an extremely slippery road; it is only admissible if done by the legislator after extensive public discussion. Disagreement among doctors about the definition and diagnosis of death causes distrust among the public, aggravates the shortage of donor organs and makes legal security an illusion. Three diagnostic ‘schools’ are compared: the Anglo-American (using Harvard's criteria), the French (using Mollaret's coma dépassé) and the Austro-German (using absence of intracranial blood circulation). On grounds of logic only the Austro-German diagnosis is reliable; it is not based on a statistically irreversible absence of outwardly perceptible manifestations of brain function, but proves and documents with certainty the total and irreversible impossibility of brain function. At present this has to be done by bilateral angiography of both carotid and vertebral arteries; if negative concerning the intracranial part, this proves death. In normal cases the traditional criteria may be used; in abnormal cases where no infringement of the body is foreseeable death need not be a certainty in order to stop therapy, provided the patient is irreversibly comatose and also respirator-dependent; in abnormal cases where an infringement is foreseeable death should be proved and documented to make the infringement lawful, apart from other conditions such as consent. Proof can be obtained by the Austro-German method or by discontinuing resuscitation during at least 15 consecutive minutes where this is legally permissible. Most German and Dutch lawyers concerned share this view.

scholarly journals The Review of Chemistry, Pharmacology and Processing Method of Rhubarb (Rheum species)

2019 ◽  
Vol 8 ◽  
Author(s):  
Jingwen He ◽  
Liang Wang ◽  
Hongxing Guo ◽  
Hui Zhao ◽  
Jiachen Sun
Keyword(s):  
Blood Circulation ◽  
Processing Method ◽  
The Body ◽  
Chemical Compositions ◽  
Pharmacological Activities ◽  
Processing Methods ◽  
Traditional Medicines ◽  
Toxic Materials ◽  
Different Types ◽  
Body Cooling

Rhubarb is one of the Chinese traditional medicines. About ninety-four compounds with five different types of skeletons (anthraquinone, anthrones, stilbenes, flavonoids and acylglucosides) have been isolated from rhubarb so far. These constituents are effective in purgative, clearing heat-fire, removing toxic materials from the body, cooling blood and promoting blood circulation. Recent studies have shown that the appropriate processing methods may directly impact on its nutraceutical activities and chemical compositions. Here, we summarize the update progress in the chemical compositions, pharmacological activities and processing methods of rhubarb.

scholarly journals Sustained elevation of MG53 in the bloodstream increases tissue regenerative capacity without compromising metabolic function

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Zehua Bian ◽  
Qiang Wang ◽  
Xinyu Zhou ◽  
Tao Tan ◽  
Ki Ho Park ◽  
...  
Keyword(s):  
Blood Circulation ◽  
Tissue Injury ◽  
Eccentric Contraction ◽  
The Body ◽  
Muscle Performance ◽  
Membrane Repair ◽  
Injury Repair ◽  
Family Protein ◽  
Normal Glucose ◽  
Dermal Wound

Abstract MG53 is a muscle-specific TRIM-family protein that presides over the cell membrane repair response. Here, we show that MG53 present in blood circulation acts as a myokine to facilitate tissue injury-repair and regeneration. Transgenic mice with sustained elevation of MG53 in the bloodstream (tPA-MG53) have a healthier and longer life-span when compared with littermate wild type mice. The tPA-MG53 mice show normal glucose handling and insulin signaling in skeletal muscle, and sustained elevation of MG53 in the bloodstream does not have a deleterious impact on db/db mice. More importantly, the tPA-MG53 mice display remarkable dermal wound healing capacity, enhanced muscle performance, and improved injury-repair and regeneration. Recombinant human MG53 protein protects against eccentric contraction-induced acute and chronic muscle injury in mice. Our findings highlight the myokine function of MG53 in tissue protection and present MG53 as an attractive biological reagent for regenerative medicine without interference with glucose handling in the body.

scholarly journals Polysialic Acid Modified Liposomes for Improving Pharmacokinetics and Overcoming Accelerated Blood Clearance Phenomenon

Coatings ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 834
Author(s):  
Xi Han ◽  
Ting Zhang ◽  
Mengyang Liu ◽  
Yanzhi Song ◽  
Xinrong Liu ◽  
...  
Keyword(s):  
Blood Circulation ◽  
Polysialic Acid ◽  
Repeated Administration ◽  
The Body ◽  
Circulation Time ◽  
Blood Clearance ◽  
In Vivo Evaluation ◽  
Accelerated Blood Clearance ◽  
Abc Phenomenon

Poly (ethylene glycol) (PEG) modified nanocarriers are being used widely in the drug delivery system (DDS). However, the “accelerated blood clearance (ABC) phenomenon” was induced upon repeated administration of PEG-modified liposomes, resulting in reduced blood circulation time, and increased accumulation in liver and spleen. To avoid the unexpected phenomenon, polysialic acid (PSA) was selected to modify liposomes. PSA is a natural, highly hydrophilic polysaccharide polymer for which no receptors exists in the body. It is non-immunogenic, biodegradable and endows the conjugated bioactive macromolecule and drugs with increased circulation time in vivo. In the present study, the in vivo evaluation showed that PSA modified liposomes (PSA-Lip) afford extended blood circulation in wistar rats and beagle dogs. Moreover, the ABC phenomenon did not occur and the IgM antibody was not induced after repeated injections of PSA-Lip. These results strongly suggest that PSA modification represents a promising strategy to afford good stealth of the liposomes without evoking the ABC phenomenon.

An Analysis of Leg Muscle Stretch Using 3D Digital Image Correlation

2017 ◽  
Vol 7 (3) ◽  
pp. 30-43
Author(s):  
G.B Praveen ◽  
S. Raghavendra ◽  
Victor I. C. Chang
Keyword(s):  
Strain Distribution ◽  
Blood Circulation ◽  
Energy Production ◽  
The Body ◽  
Image Correlation ◽  
Posterior Compartment ◽  
Strain Pattern ◽  
3D Digital Image Correlation ◽  
The Subject ◽  
Leg Muscle

Sural region is called as the bottom heart of the body since it is essential for the maintenance of venous circulatory adequacy during upright posture and activity. Previous research has found that ankle joint equinus can lead to foot pathologies. The paper presents a generic methodology to compute the strain pattern in the Sural and calcaneal region during leg dorsiflexion experiment. In the experiment, the subject is made to stand on an inclination plane and images are captured at varying angular inclinations. Strain plots obtained after comparison indicates the strain distribution in the posterior compartment of sural and calcaneal regions. The experiment is then repeated for four other participants and the trends are observed. VIC-3D is used to determine the strain distribution on two important superficial components of the leg region, namely the Sural and calcaneal regions, subjected to varied degrees of foot dorsiflexion. The experiment is extremely important as the primary knowledge gained will assists us to generate muscle-tendon units which can result into better understanding of the force and energy production. Moreover, this exercise can be used to regulate the blood circulation and avoid the syndrome mentioned above.

Comparative morphology of the body wall in flatworms (Platyhelminthes)

2004 ◽  
Vol 82 (2) ◽  
pp. 194-210 ◽  
Author(s):  
Seth Tyler ◽  
Matthew Hooge
Keyword(s):  
Body Wall ◽  
Comparative Morphology ◽  
The Body ◽  
Wall Structure ◽  
Cell Renewal ◽  
Free Living ◽  
Special Adaptation ◽  
Continuous Sheet ◽  
The One ◽  
Taxonomic Groups

The soft-bodied nature of the platyhelminths is due largely to the structure of the body wall and its lack of sclerotic elements such as cuticle. Free-living members, i.e., most turbellarians, show considerable variety, but the basic form of the body wall comprises a simple ciliated epithelium overlying a network of muscles. We illustrate this body wall structure in a representative typhloplanoid rhabditophoran and discuss variations in representatives of the Acoela, Catenulida, and other free-living rhabditophorans. The major parasitic groups of platyhelminths, the rhabditophoran Neodermata, follow a developmental pattern that replaces a similar ciliated epidermis in a larval stage with a specialized epidermis called a neodermis, which is assumed to be key to their success as parasites. This neodermis consists of a syncytium that covers the body in a continuous sheet connected to perikarya that lie below the body wall musculature. The neodermis can be seen as a special adaptation of a developmental mechanism common to all platyhelminths, in which epidermal growth and renewal are accomplished by replacement cells originating beneath the body wall. The cell type responsible for all cell renewal, including body wall renewal, in platyhelminths is the neoblast, and its presence may be the one autapomorphic character that unites all taxonomic groups of platyhelminths.

scholarly journals Effect of Keishibukuryogan on Genetic and Dietary Obesity Models

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Fengying Gao ◽  
Satoru Yokoyama ◽  
Makoto Fujimoto ◽  
Koichi Tsuneyama ◽  
Ikuo Saiki ◽  
...  
Keyword(s):  
Lipid Metabolism ◽  
Rat Model ◽  
High Fat Diet ◽  
Blood Circulation ◽  
The Body ◽  
Kampo Medicine ◽  
High Fat ◽  
Scavenging Effect ◽  
Dietary Obesity ◽  
Mouse Obesity

Obesity has been recognized as one of the most important risk factors for a variety of chronic diseases, such as diabetes, hypertension/cardiovascular diseases, steatosis/hepatitis, and cancer. Keishibukuryogan (KBG, Gui Zhi Fu Ling Wan in Chinese) is a traditional Chinese/Japanese (Kampo) medicine that has been known to improve blood circulation and is also known for its anti-inflammatory or scavenging effect. In this study, we evaluated the effect of KBG in two distinct rodent models of obesity driven by either a genetic (SHR/NDmcr-cp rat model) or dietary (high-fat diet-induced mouse obesity model) mechanism. Although there was no significant effect on the body composition in either the SHR rat or the DIO mouse models, KBG treatment significantly decreased the serum level of leptin and liver TG level in the DIO mouse, but not in the SHR rat model. Furthermore, a lower fat deposition in liver and a smaller size of adipocytes in white adipose tissue were observed in the DIO mice treated with KBG. Importantly, we further found downregulation of genes involved in lipid metabolism in the KBG-treated liver, along with decreased liver TG and cholesterol level. Our present data experimentally support in fact that KBG can be an attractive Kampo medicine to improve obese status through a regulation of systemic leptin level and/or lipid metabolism.

scholarly journals Energetic constraints on an early developmental stage: a comparative view

2007 ◽  
Vol 4 (1) ◽  
pp. 123-126 ◽  
Author(s):  
James F Gillooly ◽  
Gustavo A Londoño ◽  
Andrew P Allen
Keyword(s):  
Metabolic Rate ◽  
Developmental Stage ◽  
Developmental Stages ◽  
The Body ◽  
Early Developmental Stage ◽  
Time Required ◽  
Taxonomic Groups ◽  
Relationship Of ◽  
The Relationship ◽  
Early Developmental

Biologists have long sought a means by which to quantify similarities and differences in embryonic development across species. Here we present a quantitative approach for predicting the timing of developmental events based on principles of allometry and biochemical kinetics. Data from diverse oviparous species support model predictions that most variation in the time required to reach one early developmental stage—the time to first heartbeat—is explained by the body size and temperature dependence of metabolic rate. Furthermore, comparisons of this stage with later developmental stages suggest that, after correcting for size and temperature, the relationship of metabolic rate to the rate of embryogenesis is approximately invariant across taxonomic groups and stages of ontogeny.

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