Anus

• How long is the anal canal?

  3-4cm
• The RECTOANAL JUCTION consists of what types of epithelium?

  Simple columnar and stratified squamous
• Epithelium of RECTUM?

  Simple columnar epithelium
• EPITHELIUM of anus?

  stratified squamous epithelium
• Which anal sphincter is the UPPER REGION?

  Internal
• Which anal sphincter is the LOWER REGION?

  External
• Which is thicker, internal or external anal sphincter?

  internal
• Internal anal sphincter: circular smooth muscle
• External anal sphincter: skeletal muscle
• Skeletal levator ani muscle: or pelvic diaphragm is a broad muscle group that forms the greater part of the floor of the pelvic cavity
• What is this?

  Anus

  
• Muscularis mucosae and intestinal gland terminate where?

  anal-rectal junction
• The lamina propria in RECTUM consists of IRREGULAR CONNECTIVE TISSUE
• Submucosa of rectum is composed of connective tissue in LAMINA PROPRIA or ANUS