In the intestines (blind-gut) of free- living flatworms, enzymes help break down the food into small particles. These particles are taken inside the cells of the intestinal wall where digestion is completed through. Because the intestine branches into almost all parts of the body, completely digested food can diffuse to other body tissues.
Parasitic flatworms have a simpler digestive tract than the free-living flatworms.
Tapeworms have no digestive tract at all (absorb the digested food from host).
All roundworms have a long tube-shaped digestive tract with openings at both ends. This system is efficient because food can enter through the mouth and continue straight through the digestive tract. Any material in the food that cannot be digested leaves through the anus.
No comments:
Post a Comment