Spicule definition biology
Webspic·ule ( spik'yūl ), 1. A small needle-shaped body. 2. Accessory reproductive structure in male nematodes; useful in identification of species. [L. spiculum, dim. of spica, or spicum, … WebNov 25, 2024 · Spicules are microscopic crystalline structures which gives the sponges their rigidity and form. Spicule consists of spines or rays that radiate from a point. These are secreted by special mesenchymal amoebocytes called scleroblast cells. The following are various types of spicules:
Spicule definition biology
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WebJul 24, 2024 · spicule A small, slender, sharp-pointed piece, usually on a surface, a small spike of flowers. Last updated on July 24th, 2024 You will also like... Freshwater … WebOther articles where siliceous spicule is discussed: sponge: Mineral skeletons: Siliceous spicules, found in the Demospongiae and in the Hexactinellida, are made essentially of silicic acid; they also contain some water, a small quantity of other compounds containing sodium, potassium, iron, and chlorine, and a small quantity of organic matter, called spiculin, …
WebNov 1, 2003 · We are beginning to understand the mechanisms of spicule secretion and the role of spicules and skeletal frameworks in the biology, ecology, and evolution of sponges. Molecular techniques and ecological experiments have demonstrated the genetic control of the process and the contribution of environmental factors to the expression of a sponge ... WebTerms in this set (7) Chicken liver sponge. Chondrilla caribbea, Small, sponge khaki or brownish lumps or lobes usually attached to seagrass blades. Spicules =. Spheraster. Style. White sponge, Geodia gibberosa, Massive irregular smooth sponges with clusters of small oscules in depressions. Common on shallow, inshore hard bottoms and seagrass ...
WebCnidocytes (‘stinging cells’) are specialized cells that define the phylum Cnidaria (sea anemones, jellyfish, corals and hydras). They contain an “explosive” organelle called cnidocyst that acts as a 600 million-years-old microscopic injection system and is important for prey capture and anti-predator defense. Web( spik'yūl ), 1. A small needle-shaped body. 2. Accessory reproductive structure in male nematodes; useful in identification of species. [L. spiculum, dim. of spica, or spicum, a point] Farlex Partner Medical Dictionary © Farlex 2012 spicule (spĭk′yo͞ol) also spicula (-yə-lə) n. pl. spic·ules also spic·ulae (-yə-lē)
Webspicule. structrual support of a sponge. pore. allows for water flow through a sponge, sponges obtain food by passing water through pores. collar cell. generates water flow …
WebDec 11, 2015 · Spongin is a protein and it is secreted by cells called spongocytes. Although sponges have no muscle tissue and are sessile organisms, they do have muscle-like cells called myocytes. Myocytes surround canal openings and porocytes. These cells are able to contract in order to regulate water flow through the body. hawaii doe superintendent hayashiWebSkeleton of either 1- or 4-rayed siliceous spicules, spongin fibres, or both; skeleton lacking in a few primitive genera; most abundant and widely distributed group of sponges; occur from intertidal regions to depths of about 5,500 m (18,000 ft) … hawaii doe graduation 2022WebApr 20, 2024 · Spicules are tiny structures that are found on the body of the sponges. Spicules protect the body from predators. They also provide structural support to the organism. The larger spicules are called the megascleres and the smaller spicules are called the microscleres. Sponge Animation - Spicules Copy link Watch on hawaii doppler radarWebWhat is a nail Spicule? Most often, the great toenail is affected. Improper cutting of the ingrown toenail may produce a spicule of nail, which can induce damage to the lateral nail fold when not completely removed [1]. With time, the spicule becomes embedded in the surrounding soft tissue where it may act like a foreign body. hawaii doh npdes permitWebspicule noun spic· ule ˈspi- (ˌ)kyül 1 : a slender pointed usually hard body especially : one of the minute calcareous or siliceous bodies that support the tissue of various invertebrates (such as sponges) 2 : a spikelike short-lived prominence appearing close to the chromosphere of the solar atmosphere spicular ˈspi-kyə-lər adjective spiculation hawaii doh epermittingWebLearn the definition of 'spicule'. Check out the pronunciation, synonyms and grammar. Browse the use examples 'spicule' in the great English corpus. hawaii doppler radar kitvWebspic•ule (ˈspɪk yul) n. 1. a small, needlelike crystal, process, or the like. 2. one of the small, hard, calcareous or siliceous bodies that serve as the skeletal elements of various marine and freshwater invertebrates. [1775–85; < Latin spīculum] spic′u•late` (-yəˌleɪt, -lɪt) adj. hawaii doh covid data