scholarly journals The Post-Larval Stage of Arenicola marina

1893 ◽  
Vol 3 (1) ◽  
pp. 48-53 ◽  
Author(s):  
Wm. Blaxland Benham
Keyword(s):  
Larval Stage ◽  
The Body ◽  
Stage I ◽  
Developmental History ◽  
Arenicola Marina ◽  
History Of ◽  
Adult Number

By “post-larval stage” I wish to indicate that stage in the developmental history of Arenicola at which the full adult number of somites has appeared, and the body is already distinguishable into (a) an anterior chætigerous region, and (b) a posterior achætous region or tail, but in which the gills are not yet completely formed or have not yet even made their appearance.

The Mechanism of Proboscis Movement in Arenicola

1954 ◽  
Vol s3-95 (30) ◽  
pp. 251-270
Author(s):  
G. P. WELLS
Keyword(s):  
Body Fluid ◽  
Body Wall ◽  
The Body ◽  
Stage I ◽  
Stage Iii ◽  
Forward Movement ◽  
Arenicola Marina ◽  
Buccal Mass ◽  
The Difference ◽  
Longitudinal Muscles

The mechanism of proboscis movement is analysed in detail in Arenicola marina L. and A. ecaudata Johnston, and discussed in relation to the properties of the hydrostatic skeleton. Proboscis activity is based on the following cycle of movements in both species. Stage I. The circular muscles of the body-wall and buccal mass contract; the head narrows and lengthens. Stage IIa. The circular muscles of the mouth and buccal mass relax; the gular membrane (or ‘first diaphragm’ of previous authors) contracts; the mouth opens and the buccal mass emerges. Stage IIb. The longitudinal muscles of the buccal mass and body-wall contract; the head shortens and widens and the pharynx emerges. Stage III. As Stage I. The two species differ anatomically and in their hydrostatic relationships. In ecaudata, the forward movement of body-fluid which extrudes and distends the proboscis is largely due to the contraction of the gular membrane and septal pouches. In marina, the essential mechanism is the relaxation of the oral region which allows the general coelomic pressure to extrude the proboscis. The gular membrane of marina contracts as that of ecaudata does, but its anatomy is different and it appears to be a degenerating structure as far as proboscis extrusion is concerned. Withdrawal of the proboscis may occur while the head is still shortening and widening in Stage IIb, or while it is lengthening and narrowing in Stage III. The proboscis is used both in feeding and in burrowing; in the latter case nothing enters through the mouth; the difference is largely caused by variation in the timing of withdrawal relative to the 3-stage cycle.

scholarly journals A Contribution to Our Knowledge of the Life History of Arenicola Marina L.

1948 ◽  
Vol 27 (3) ◽  
pp. 554-580 ◽  
Author(s):  
G. E. Newell
Keyword(s):  
Life History ◽  
Breeding Season ◽  
Germ Cells ◽  
Full Moon ◽  
Body Cavity ◽  
The Body ◽  
Spawning Period ◽  
Arenicola Marina ◽  
History Of ◽  
New Moon

The breeding season of the lugworms of the Whitstable area is a sharply defined one, extending for 14 days between the new moon and full moon spring tides in the second half of October. Spawning begins slowly and reaches a maximum at the intervening neap tides and then declines in intensity.Both eggs and sperms are discharged from the burrows at extreme low water to lie on the surface of the sand. Here fertilization occurs.No germ cells were detected in the body cavity from November to June, but from August onwards to the end of October 98% of the adult worms are ripe.At the end of the spawning period about 40% of the adults die.A brief description of gametogenesis and of the mature gametes is given.Germ cells are discharged through the nephridia.

Aspergillus Spondylodiscitis After Spinal Stenosis Surgery: A Case Report

2020 ◽  
Vol 5 (3 And 4) ◽  
pp. 155-160
Author(s):  
Mohsen Aghapoor ◽  
◽  
Babak Alijani Alijani ◽  
Mahsa Pakseresht-Mogharab ◽  
◽  
...  
Keyword(s):  
Antifungal Drugs ◽  
The Body ◽  
Lower Limbs ◽  
Lumbar Pain ◽  
Case Presentation ◽  
Delay In Diagnosis ◽  
Death Case ◽  
Therapeutic Results ◽  
History Of ◽  
Probable Diagnosis

Background and Importance: Spondylodiscitis is an inflammatory disease of the body of one or more vertebrae and intervertebral disc. The fungal etiology of this disease is rare, particularly in patients without immunodeficiency. Delay in diagnosis and treatment of this disease can lead to complications and even death. Case Presentation: A 63-year-old diabetic female patient, who had a history of spinal surgery and complaining radicular lumbar pain in both lower limbs with a probable diagnosis of spondylodiscitis, underwent partial L2 and complete L3 and L4 corpectomy and fusion. As a result of pathology from tissue biopsy specimen, Aspergillus fungi were observed. There was no evidence of immunodeficiency in the patient. The patient was treated with Itraconazole 100 mg twice a day for two months. Pain, neurological symptom, and laboratory tests improved. Conclusion: The debridement surgery coupled with antifungal drugs can lead to the best therapeutic results.

Re-imagining Reproduction: Unsettling Metaphors in the History of Imperial Science and Commercial Surrogacy in India

Somatechnics ◽  
2015 ◽  
Vol 5 (1) ◽  
pp. 88-103 ◽  
Author(s):  
Kalindi Vora
Keyword(s):  
Assisted Reproductive Technologies ◽  
Reproductive Technologies ◽  
The Body ◽  
Body Parts ◽  
Colonial History ◽  
Women's Bodies ◽  
Commercial Surrogacy ◽  
Art Practices ◽  
History Of ◽  
Travel Industry

This paper provides an analysis of how cultural notions of the body and kinship conveyed through Western medical technologies and practices in Assisted Reproductive Technologies (ART) bring together India's colonial history and its economic development through outsourcing, globalisation and instrumentalised notions of the reproductive body in transnational commercial surrogacy. Essential to this industry is the concept of the disembodied uterus that has arisen in scientific and medical practice, which allows for the logic of the ‘gestational carrier’ as a functional role in ART practices, and therefore in transnational medical fertility travel to India. Highlighting the instrumentalisation of the uterus as an alienable component of a body and subject – and therefore of women's bodies in surrogacy – helps elucidate some of the material and political stakes that accompany the growth of the fertility travel industry in India, where histories of privilege and difference converge. I conclude that the metaphors we use to structure our understanding of bodies and body parts impact how we imagine appropriate roles for people and their bodies in ways that are still deeply entangled with imperial histories of science, and these histories shape the contemporary disparities found in access to medical and legal protections among participants in transnational surrogacy arrangements.

Receptions of the Past: Commemoration, Racism, Desire

Somatechnics ◽  
2017 ◽  
Vol 7 (2) ◽  
pp. 288-303
Author(s):  
Michael Connors Jackman
Keyword(s):  
Critical Point ◽  
Social Relations ◽  
White Privilege ◽  
Body Politic ◽  
The Body ◽  
Race And Racism ◽  
Lesbian And Gay ◽  
The Past ◽  
History Of

This article investigates the ways in which the work of The Body Politic (TBP), the first major lesbian and gay newspaper in Canada, comes to be commemorated in queer publics and how it figures in the memories of those who were involved in producing the paper. In revisiting a critical point in the history of TBP from 1985 when controversy erupted over race and racism within the editorial collective, this discussion considers the role of memory in the reproduction of whiteness and in the rupture of standard narratives about the past. As the controversy continues to haunt contemporary queer activism in Canada, the productive work of memory must be considered an essential aspect of how, when and for what reasons the work of TBP comes to be commemorated. By revisiting the events of 1985 and by sifting through interviews with individuals who contributed to the work of TBP, this article complicates the narrative of TBP as a bluntly racist endeavour whilst questioning the white privilege and racially-charged demands that undergird its commemoration. The work of producing and preserving queer history is a vital means of challenging the intentional and strategic erasure of queer existence, but those who engage in such efforts must remain attentive to the unequal terrain of social relations within which remembering forms its objects.

Myriad Aspects of Secular Thinking on Malayali Cuisine

GIS Business ◽  
2019 ◽  
Vol 14 (3) ◽  
pp. 202-206
Author(s):  
SAJITHA M
Keyword(s):  
Social Status ◽  
Daily Life ◽  
Social Indicators ◽  
The Body ◽  
Human Being ◽  
Healthy Life ◽  
The Social ◽  
The World ◽  
History Of ◽  
Civilized Society

Food is one of the main requirements of human being. It is flattering for the preservation of wellbeing and nourishment of the body.  The food of a society exposes its custom, prosperity, status, habits as well as it help to develop a culture. Food is one of the most important social indicators of a society. History of food carries a dynamic character in the socio- economic, political, and cultural realm of a society. The food is one of the obligatory components in our daily life. It occupied an obvious atmosphere for the augmentation of healthy life and anticipation against the diseases.  The food also shows a significant character in establishing cultural distinctiveness, and it reflects who we are. Food also reflected as the symbol of individuality, generosity, social status and religious believes etc in a civilized society. Food is not a discriminating aspect. It is the part of a culture, habits, addiction, and identity of a civilization.Food plays a symbolic role in the social activities the world over. It’s a universal sign of hospitality.[1]

A Case Report on Glanzmann’s Thrombasthenia: A Rare Platelet Function Disorder

2018 ◽  
Vol 2 (02) ◽  
pp. 59-60
Author(s):  
Farida Yasmin ◽  
Md. Anwarul Karim ◽  
Chowdhury Yakub Jamal ◽  
Mamtaz Begum ◽  
Ferdousi Begum
Keyword(s):  
Case Report ◽  
Platelet Function ◽  
The Body ◽  
Presenting Symptoms ◽  
Glanzmann’S Thrombasthenia ◽  
Glanzmann's Thrombasthenia ◽  
Platelet Function Disorders ◽  
Recurrent Epistaxis ◽  
Severe Epistaxis ◽  
History Of

Epistaxis in children is one of the important presenting symptoms for attending emergency department in paediatric patients. Recurrent epistaxis is common in children. Although epistaxis in children usually occurred due to different benign conditions, it may be one of the important presenting symptoms of some inherited bleeding disorder. Whereas most bleeding disorders can be diagnosed through different standard hematologic assessments, diagnosing rare platelet function disorders may be challenging. In this article we describe one case report of platelet function disorders on Glanzmann’s thrombasthenia (GT). Our patient was a 10-year old girl who presented to us with history of recurrent severe epistaxis. She had a bruise on her abdomen and many scattered petechiae in different parts of the body. Her previous investigations revealed no demonstrable haemostatic anomalies. After performing platelet aggregation test, she was diagnosed as GT.

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