Penis consists of a body and glands. Body consists of The erectile corpus cavernosum penis, whose two crura are attached to the ischial arch. Corpus cavermosum urethrae or corpus spongiosum penis surrounding urethra muscles. Glans penis forms the tip of penis. Body of penis Consists of the corpora cavernosa, which have a capsule, a system of trabeculae and […]

Urethra of Male The urethra is a long mucous tube, which extends from the urinary bladder to the glans penis. It consists of pelvic and extrapelvic or penile part. The pelvic part is lined by transitional epithelium. The vas deferens, seminal vesicles, prostate glands are opening into the urethra in its initial part and the ducts of bulbourethral

Accessory genital glands open into the urethra and include seminal vesicles, prostate and bulbourethral or cowper’s glands. Seminal vesicle Seminal vesicle of bull is a thick-walled sacculated tube bent on itself several times in a tortuous manner, to form lobules separated by heavy smooth muscular septa. The capsule and the septa contain abundant plain muscle fibres,

Ductus deferens or Vas deferens has a mucosa, muscularis and fibrosa. The mucosa form longitudinal folds and is lined by pseudostratified columnar cells similar to that of ductus epididymis. But the cells are low and stereocilia shows variable distribution, absent form some cells and present in others. Lamina propria is rich in elastic tissue. Muscularis

Histology of Epididymis Epididymis is a highly convoluted tube to form a solid body so that in section the tube is cut several times. The duct is enveloped by collagenous tunic, which contains circular smooth muscle. The duct has a wide lumen and the mucosa has no folds. The epithelium is pseudostratified columnar ciliated and

Male Reproductive system or Male genital system Consists of the testis, epididymis, vas deferens, penis and accessory genital glands. Testis Epididymis Vas deferens Accessory genital glands Urethra Penis

From the respiratory bronchioles onwards, the structures contain alveoli in their walls and serve both as conducting and respiratory passages. The epithelium is initially simple cuboidal but become flattened or squamous later. No Goblet cells or glands occur in any part. The respiratory structures consist;  Respiratory bronchiole,  Alveolar duct,  Alveolar Sac,  Alveoli. Respiratory bronchiole These

trachea divides into two chief bronchi one for each lung, entering at the hilus, the bronchus divides into smaller bronchi which gives rise to several orders of bronchioles.  The general structure consists of a mucosa, muscularis, a fibro-elastic membrane which encloses a cartilage and loose collagenous peribronchial layer. Gradual changes in structure occur, as the

The lungs are paired organs located in the thoracic cavity. The surface of each lung is covered by a serous membrane (pleura). Each lung is divided into a number of lobes and pleura, dips into interlobar fissures tissue and covers interlobar surfaces. Each lobe is sub-divided by interlobular tissue into lobules. Each lobule is pyramidal