anus and anal canal

Question 1

puborectalis

Answer 1

acts like a string pulling upwards for faeces not to come out

Question 2

leviator ani

Answer 2

supports anal canal and lower part of rectum

Question 3

anococcygeal body connects?

Answer 3

anus to coccyx

Question 4

external anal sphincter

Answer 4

Voluntary

deep, superficial, and subcutaneous

Question 5

3 important veins

Answer 5

superior rectal
middle rectal
inferior rectal

Question 6

internal Haemorrhoid

Answer 6

varicosities of superior rectal vein

covered by mucus membrane

Question 7

external hemorrhoids

Answer 7

varicosities of inferior rectal veins
covered by skin
assosiated with internal

Question 8

innervation of anal canal above pectinate line

Answer 8

involuntary, autonomic
nerves arise from inferior hypogastric plexus
sympathetic -> maintain the tone of internal anal sphincter
parasymp: peristaltic movement during defecation

only sensitive to strech

Question 9

anal canal innervation below pectinate line

Answer 9

somatic, voluuntary
they’re branches of pudendal nerve
area below the pectinate line is sensitive to pain, touch and temperature
enable contraction of external anal sphincter