These cancers start in cells in the skin or anal lining that make the brown pigment called melanin. Cavity of urinary bladder V. The keratinized layer is continuous with the skin of the anal opening and external body. The zona columnaris is the upper half of the canal and is lined by simple columnar epithelium. Submit Feedback. Anastomosing branches from the middle rectal artery. At the level of the middle of the sacrum, the sigmoid colon loses its mesentery and gradually becomes the rectum, which, at the upper limit of the pelvic diaphragm, ends in the anal canal fig.
Anal canal | definition of anal canal by Medical dictionary
Neurovascular Supply and Lymphatics As discussed above, the pectinate line divides the anal canal into two parts — which have a different arterial supply, venous drainage, innervation and lymphatic drainage. Volkmann's c's canals communicating with the haversian canals, for passage of blood vessels through bone. The anal canal connects with the rectum at the point where it passes through a muscular pelvic diaphragm. It is located in a position between the rectum and the anus, under the level of the pelvic diaphragm. Cute nubiles sex com 5 min Chicky Hoover -
Thumping sweethearts anal canal. My naughty niece wanted to appear on the channel 15 min Povbrazil - 9. Continuity is…. Samping beautys taut anal canal. Healthy cells grow and multiply at a set rate, eventually dying at a set time.
The rectum, about 15 cm long, widens below as the ampulla, which is very distensible. Anastomosing branches from the middle rectal artery. Anal canal. It lies in the anal triangle of perineum in between the right and left ischioanal fossa. On this page Rectum fig. Anal cancers are often divided into 2 groups, which are sometimes treated differently:. The anus is the part of the large bowel that opens to the outside of the body.