Rectum

Question 1

Size

Answer 1

5 inches long

Question 2

Flexures

Answer 2

1. It follows sacrococcygeal concavity forming sacral flexure
2. At its lower end, it bends backwards forming anal canal called perineal flexure
3. It has lateral flexures: upper and lower are concave to left while middle is concave to right

Question 3

Peritoneal covering: upper 1/3

Answer 3

Covered on its front and sides

Question 4

Peritoneal covering: lower 1/3

Answer 4

Not covered with peritoneum (bare) because peritoneum is reflected forwards to:
1. Upper part of urinary bladder posterior wall (in male) forming rectovesical pouch (7.5 cm from anus)
2. Back of upper 1/3 of vagina posterior wall (in female) forming rectouterine (Douglas) pouch (5.5 cm from anus)