1.Chloragogen cells are analogus to liver cells of vertebrates as it helps in excretion and
food storage.
2.Chromaphil cells of
earthworm behaves as salivary gland only because they lubricate the food .
3.Typhlosolar
region in earthworm starts from 27
th to 95th segment. It is a large mid
dorsal fold in the intestine .It is analogous to villi of higher organisms.
4.The blood moves from behind to forward in dorsal vessel which is provided with valves.
5.Earthworms are the friends of the farmers as it increase the fertility of the
soil by digesting and excreting the pellets of soil.
6.Trochophore larva is of considerable interest since it also occurs in mollusks and provide one line of evidence relating
annelida and mollusca.
7.The reproductive individuals of neries are called heteroneries which show two distinct regions in the body. Anterior asexual region is called atoke and posterior sexual region is called epitoke.
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