What does Cnidocil mean?
Definition of cnidocil : a minute process of a nematocyst that when touched is believed to cause the projection of the stinging thread.
What is the function of the Cnidocil?
noun Zoology. a hairlike sensory process projecting from the surface of a cnidoblast, believed to trigger the discharge of the nematocyst.
What are Cnidocil in cnidarians?
The cnidocil at the apical end of Hydra nematocytes is a mechanosensory cilium, which acts as a “trigger” for discharge of the nematocyst capsule. Two paralogous sequences of nematocilin are present in the Hydra genome and appear to be the result of recent gene duplication.
What is the purpose of Epitheliomuscular cells in the cnidarian body?
These include epitheliomuscular cells which contract and enable movement, interstitial cells that give rise to many other cell types such as egg and sperm, cnidocytes which are specialized cells unique to cnidarians which in some cnidarians contain stinging structures, mucus-secreting cells which glandular cells that …
What is Gastrodermis made of?
The gastric cavity communicates with the external environment through a single opening and is lined by an endodermal epithelial layer, or gastrodermis, composed mainly of epitheliomuscular cells, and also gland cells that secrete digestive enzymes and mucous-secreting cells.
What are Epitheliomuscular cells?
: of or being an epithelial cell of coelenterates that is modified to function in contraction and has an elongated fibrillar base that functions in the same manner as a muscle cell.
What does the gastrodermis do?
Gastrodermis helps in extracellular digestion of food in the gastrovascular cavity.
What is the function of the gastrodermis?
The gastrodermis is the inner layer of cells that serves as a lining membrane of the gastrovascular cavity of Cnidarians. The term is also used for the analogous inner epithelial layer of Ctenophores. It has been shown that the gastrodermis is among the sites where early signals of heat stress are expressed in corals.
What is the difference between epidermis and gastrodermis?
The outer layer (from ectoderm) is called the epidermis and lines the outside of the animal, whereas the inner layer (from endoderm) is called the gastrodermis and lines the digestive cavity.
How do Cnidaria get oxygen?
Instead, all of the cells in a cnidarians body are capable of absorbing oxygen from the water around them, and expelling carbon dioxide back into the water through diffusion. Depending on the species, water enters through a mouth or through surface cells, and exits through either location.
What is the meaning of the word cnidocil?
Definition of cnidocil. : a minute process of a nematocyst that when touched is believed to cause the projection of the stinging thread.
What does it mean when a candidate wins a plurality of votes?
However when it comes to voting, plurality refers to “the excess of votes received by the leading candidate, in an election in which there are three or more candidates, over those received by the next candidate.” This means that someone who wins the plurality of votes received more than any of the other candidates but not necessarily the majority.
How to make a noun a plural noun?
1 To make regular nouns plural, add ‑s to the end. cat – cats. house – houses. 2 If the singular noun ends in ‑s, -ss, -sh, -ch, -x, or -z, add ‑es to the end to make it plural. truss – trusses. bus – buses. marsh – marshes. lunch – lunches. tax – taxes.
What is the definition of the nematocyst cnidocil?
Definition of cnidocil. : a minute process of a nematocyst that when touched is believed to cause the projection of the stinging thread. You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.