Question

What are the characteristic features of platyhelminthes?

Answer 1

(a) The body is flat, leaf-like or tapelike, bilaterally symmetrical (left and right side of the body are similar).
(b) They are triploblastic (have three germ layers ectoderm, mesoderm and endoderm) with organ system level of organisation.
(c) Respiratory and circulatory systems are under developed.
(d) Excretion occurs through flame cells.
(e) The nervous system is primitive but with brain.
(f) Mostly parasites, some are free living like Planaria .