Immune or Hematopoietic Spleen (lymphoid)
Spleen (lymphoid) See above; included for immune function Body Area Immune or Hematopoietic Paired Left and Right No
Spleen (lymphoid) See above; included for immune function Body Area Immune or Hematopoietic Paired Left and Right No
Mammary Gland (Right) Lactation organ (breast tissue) Body Area Reproductive or Accessory Paired Left and Right Yes
Lymph Nodes (regional) Distributed lymphoid organs for immune surveillance Body Area Immune Paired Left and Right Paired or Multiple
Appendix (Vermiform) Lymphoid-rich appendage of cecum Body Area Digestive or Immune Paired Left and Right No
Ascending Colon Proximal colon segment Body Area Digestive Paired Left and Right No
Transverse Colon Mid colon segment Body Area Digestive Paired Left and Right No
Descending Colon Distal colon segment Body Area Digestive Paired Left and Right No
Sigmoid Colon S-shaped distal colon leading to rectum Body Area Digestive Paired Left and Right No
Rectum Terminal large intestine storing feces prior to defecation Body Area Digestive Paired Left and Right No
Anal Canal Terminal passage with sphincter complex Body Area Digestive or Excretory Paired Left and Right No