<p>For proper planning in the radiography of different parts of human organs, knowledge of the photon interaction parameters in different tissues of human organs are essential. Studied the x-ray and gamma photon interaction parameters such as linear attenuation coefficient, half value layer, tenth value layer, mean free path and effective electron density of almost all tissues of human organs [Adipose tissue, Blood, Brain, Breast, Cell Nucleus, Eye Lens, GI tract, Heart, Kidney, Liver, Lung , Lymph, Muscle, Ovary, Pancreas, Cartilage, Red marrow, Spongiosa, Yellow marrow, Skin, Spleen, Testis, Thyroid, Skeleton cortical bone, Skeleton cranium, Skeleton femur, Skeleton humerus,Skeleton mandible, Skeleton ribs (2<sup>nd</sup>,6<sup>th</sup>), Skeleton ribs (10<sup>th</sup>), Skeleton sacrum, Skeleton spongiosa, Skeleton vertebral column (C4) and Skeleton vertebral column (D6, L3)]. The present work is useful in the planning of radiography for different organs. This work also gives useful information for radiotherapy and dosimetry.</p>