Earthworm General Characters External Morphology Setae Study Score

Earthworm General Characters External Morphology Setae Study Score In summer, when the top soil is dry, earthworms burrow deep into the soil. the earthworm burrows are lined by slimy secretion of its body. external morphological features. size a fully grown, mature worm measures bout 3 5 mm in width and 150 mm in length. shape pheretima posthuma is long, elongated, cylindrical and narrow in shape. Earthworm: general characters, distribution, external morphology, structure and arrangement of setae earthworm: body wall, coelom, locomotion & digestive system earthworm: circulatory system, blood vessels & their arrangement earthworm: excretory system, respiratory system earthworm: nervous system and sense organs earthworm: reproductive.

Earthworm General Characters External Morphology Setae Study Score Setae: tiny, bristle like structures located on each segment except for the first and last. these setae help the earthworm anchor itself in the soil and move by providing grip. prostomium: a small, lobe like extension over the mouth that assists in the intake of food and helps in digging through the soil. morphology 1. body segmentation:. Habit and habitat of earthworm. the earthworms are burrowers. it prefers to live in the burrow during the day and comes out at night and in damp cloudy weather for the search of food, reproduction, and exploring fresh habit. thus, nocturnal in habit. the rainy season is the most favorable time for earthworms, after heavy rainfall, it leaves. The important external features are as follows: shape: earthworm is elongated, long, narrow, cylindrical or vermiform shaped. the anterior end is tapering while the posterior end is more or less blunt. body surface: body consists of dorsal and ventral surfaces. size: a mature worm measures about 150 mm in length and 3 5 mm in width. Structurally setae are fine microscopic, needle like structure. setae, being chitinous and supported with muscles chiefly serve functions of locomotions. in some species these comprise important taxonomic characters. 2.1.1.5 locomotion. setae of earthworms are chiefly locomotory purpose organs. some setae also play role in copulation.