Annelida - "Ringed Worm" Leech. ... It has both female and male reproductive organs. It can also undergo sexual reproduction with a partner, which is more beneficial due to the amount of variation you would get as opposed to asexual reproduction. The bristle worm can either lay eggs or it can make small cocoons similar to the earthworm's.
Animal reproductive system - Annelids and mollusks: Annelids have a well-developed body cavity (coelom), a part of the lining of which gives rise to gonads. In some annelids, gonads occur in several successive body segments. This is true, for example, in polychaetes, most of which are dioecious. Testes and ovaries usually develop, though not invariably, in many body segments; and the sperm and ...
The reproductive systems vary greatly between the different families of leeches. Some families, including the Glossiphoniidae, have a simple pair of gonopores that open to the ventral surface of the leech. Other families, such as the Richardsonianidae, have a complex system with a penis and vagina.
Annelida (ənĕl´Ĭdə) [Lat., anellus=a ring], phylum of soft-bodied, bilaterally symmetrical (see symmetry, biological), segmented animals, known as the segmented, or annelid, worms.Over 12,000 known species are grouped in three classes: the earthworms and freshwater worms (oligochaetes), the leeches (hirudineans), and the marine worms (polychaetes).
Most polychaetes reproduce sexually, however some reproduce asexually as well. Some are seperate sexes (male or female) while others are hermaphroditic, which means that they have both male and female reproductive systems. Methods of reproduction vary among the different species that make up the polychaete class, but most take place in water.
Annelids are a large phylum of segmented worms, with over 17,000 modern species including ragworms, earthworms and leeches. They are found in marine environments from tidal zones to hydrothermal vents, in freshwater, and in moist terrestrial environments.
Rag-worms Rag-worms mate when the body swells up with eggs or sperm. Unlike many other annelids, most rag-worms have a gender, only some are hermaphrodites. The female worm leaves its burrow on the marine floor and goes to the surface, where it releases its eggs; however, it will die soon after.
The annelids (Annelida, from Latin anellus, "little ring"), also known as the ringed worms or segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches.The species exist in and have adapted to various ecologies – some in marine environments as distinct as tidal zones and hydrothermal vents, others in fresh water, and yet others in mo...
Annelids, or segmented worms, reproduce both sexually and asexually depending on the species. In this lesson you'll learn about how some of the different annelids and how they reproduce.
Reproduction System Annelids have two types of reproductions: asexual reproduction and sexual reproduction. In asexual reproduction, some annelids use fission to produce quickly.. The backs of annelids will break and form a new alike worm. Usually, their break depends on their coats growing. Also, a few annelids reproduce by pudding.