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Male nematodes may have one or two spicules which serve to open the vulva of females and facilitate the transmission of sperm, although sperm is not transferred directly by or through the spicules. [2] [3] The gubernaculum is another organ of the nematode male copulatory system which guides the spicules during copulation.
English: Anatomical drawing of a male C. elegans nematode with emphasis on the reproductive system. Note that the actual worm is colorless and transparent. Also note that the raw SVG version of the image will not render correctly in Firefox 23.0.1 or earlier (possibly later as well) due to known Mozilla program bug #376027 but should do so in any other browser.
Mesorhabditis is a genus of nematodes.. Species in the genus Mesorhabditis exhibit an unusual form of parthenogenesis, in which sperm-producing males copulate with females, but the sperm do not fuse with the ovum.
Extremity of a male nematode showing the spicule, used for copulation, bar=100 μm [48] Most nematode species are dioecious, with separate male and female individuals, though some, such as Caenorhabditis elegans, are androdioecious, consisting of hermaphrodites and rare males. Both sexes possess one or two tubular gonads. In males, the sperm ...
Tripyloididae is a family of nematodes belonging to the order Araeolaimida. [1] Characteristics ... the male reproductive system consists of a single testis;
The main male sex organs are the penis and the scrotum, which contains the testicles that produce semen and sperm, which, as part of sexual intercourse, fertilize an ovum in the female's body; the fertilized ovum develops into a fetus, which is later born as an infant. The corresponding system in females is the female reproductive system.
Leeches are hermaphrodites, with the male reproductive organs, the testes, maturing first and the ovaries later. In hirudinids, a pair will line up with the clitellar regions in contact, with the anterior end of one leech pointing towards the posterior end of the other; this results in the male gonopore of one leech being in contact with the ...
Sperm (pl.: sperm or sperms) is the male reproductive cell, or gamete, in anisogamous forms of sexual reproduction (forms in which there is a larger, female reproductive cell and a smaller, male one).