In this article we will discuss about the structure of Earthworm (Pheretima) with the help of a diagram. 1. It is commonly known as earthworm and is terrestrial and burrowing in habit. 2. Body bilaterally symmetrical, triploblastic and metamerically segmented. 3. No distinct head or appendage but a distinct prostomium is present. 4. Clitellumis present in segments 14-16. 5. Single [...]
Pheretima: Habit and Habitat and External Features ! Habit and Habitat of Earthworms: The earthworms are burrowers. They are found in the soil rich in decaying organic matters usually in gardens, pastures, lawns, irrigated farm lands, near the banks of the ponds, lakes and rivers. The do not prefer to live in sandy, clay and acid soils which are deficient [...]
Reproductive System of Pheretima (Earthworm)! Male Reproductive Organs of Earthworm: The male reproductive organs consist of testes, testis sacs, seminal vesicles, vasa deferentia, prostate glands and accessory glands. Testes and Testis Sacs: The testes are two pairs, very minute, whitish and lobed structures situated one pair each in segment 10th and 11th found attached with the posterior surface of 9/10 [...]