explain digestive system of periplaneta americana
try to give the answer in simple way
Answers
Answer:
(i) Cockroach (Periplaneta) is omnivorous, animal which usually feeds at night.
(ii) It searches food by the sweeping of antennae and taste it by maxillary and labial palps. It captures food by the help of fore legs, labrum and labium.
(iii) In the mouth, food mixes with salivary secretion and is pushed into pharynx with the help of labium.
(iv) Food now starts moving through alimentary canal by peristalsis.
(v) Food is stored in crop. And upon entering gizzard, food is subjected to further mastication by internal teeth worked upon by muscles.
(vi) In midgut, partly digested food is mixed with enzymatic secretions of hepatic caecae and midgut itself.
(vii) Epithelial cells of midgut are also absorptive, hence also they absorb digested food.
(viii) Undigested food is passed first into ileum and then into colon. In rectum, water is absorbed from it and faeces is eliminated to outside through anus.