What are the characteristics of earthworms?

Characteristics of earthworm: the body is segmented without division, the wart foot is degenerated, and there are bristles on the body surface. Androgyny, with 1-2 pairs of gonads, the reproductive duct originated from the body cavity. When sexually mature, there is an annular band on the body surface, which can fertilize each other during mating. Eggs are produced in the girdle, and form cocoon after shedding, which develops directly.

The setae are solitary, 8, sometimes many, arranged in a ring shape, with 1-2 pairs of testis, usually at10-1node, and a pair of male reproductive pores, which are located on two or more somites behind the posterior testis, namely/kloc-0. A pair of ovaries, located at 13, have thick bands and few yolk.

Extended data

Life habits of earthworms:

1, like the dark: the earthworm is Nocturnal Animals. They live in mud caves during the day and go out at night. Usually go out at 8 pm in summer and autumn until about 4 am the next day. Their feeding and mating are carried out in the dark.

2. Like humidity: Natural terrestrial earthworms generally like to live in humid, loose and organic-rich soil, especially fertile gardens, vegetable gardens, cultivated land, ditches, rivers, ponds, canals, and sewers, garbage dumps and pools near canteens.

3, hi Jing: Earthworms like a quiet environment. Earthworms around industrial and mining areas often grow poorly or escape.

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