II. Internal Anatomy
- Extracts oxygen from water and eliminates gaseous waste.
B.Stomach - Cardiac and Pyloric - secretes hydrochloric acid.
C.Intestine - Food Broken down by enzymes, last part of digestive tract.
1.Pyloric Ceca - first part of intestine, seems to extend surface area.
D.Liver - Secretes bile which emulsifies fat
E.Kidney - Filters blood - behind gill.
F.Heart - Under gill, pumps blood
G.Swim Bladder - filled with air; Maintains buoyancy.
H.Spleen-forms and stores blood.
I.Vent-Waste materials exit here. (Also called Urogenital opening)