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Internal anatomy of a male C. elegans nematode Cross-section of female Ascaris. The large circles filled with small green circles are the uterus and eggs. The long narrow feature is the digestive tract. The smaller red and orange circles are the ovaries and oviducts.
The term ‘alae’ is the plural of ala (wing), describing either one of the pair of ridges that forms on a nematode or an individual crease found on an individual ridge. The term ‘ala’ is rarely used in describing the alae and scientific journals use the term ‘alae’ both singularly and in the plural.
Phasmids are sensilla in the lateral tail region of certain species of nematodes. [1] They are similar in their structure to amphid sensilla, but smaller. [2] [3]: 154 One classification system for nematodes places nematodes with phasmids into class Secernentea and nematodes without phasmids into class Adenophorea.
In nematodes, the gubernaculum is a hardened or sclerotized structure in the wall that guides the protrusion of the spicule during copulation. [1] For example, in Caenorhabditis elegans , spicules serve to open and dilate the vagina of the hermaphrodite and the gubernaculum is a grooved plate in which the spicules move; the gubernaculum is ...
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.
Pages in category "Nematode anatomy" The following 18 pages are in this category, out of 18 total. This list may not reflect recent changes. A. Alae (nematode anatomy)
The dauer hypothesis is a theory of evolutionary parasitism, named after the alternative, “dauer” stages of nematode development.It proposes that free-living nematode lineages evolved into parasites through two major steps, phoresy, and necromeny.
Amphids (Greek: amphi, around, double) are innervated invaginations of cuticle in nematodes. They are usually found in the anterior (head) region of the animal, at the base of the lips. Amphids are the principal olfactosensory organs of nematodes. Each amphid is made up of 12 sensory neurons with ciliated dendrites.