WebAn operculum (fish), a flap that covers the gills in bony fishes and chimaeras. The cover that rapidly opens a cnida of a cnidarian such as a jellyfish or a sea anemone. The lid may be a single hinged flap or three hinged flaps arranged like slices of pie. [1] [3] WebJun 8, 2024 · Amphibians have a moist, permeable skin that is achieved via mucus glands that keep the skin lubricated in order to perform cutaneous respiration. ... and auricular operculum. The tetrapod-like fish, Tiktaalik roseae, preceded Acanthostega and lived in a shallow water environment about 375 million years ago. All extant adult amphibians are ...
Operculum Definition & Meaning - Merriam-Webster
The operculum is a series of bones found in bony fish and chimaeras that serves as a facial support structure and a protective covering for the gills; it is also used for respiration and feeding. See more The opercular series contains four bone segments known as the preoperculum, suboperculum, interoperculum and operculum. The preoperculum is a crescent-shaped structure that has a series of ridges … See more • Hyomandibula See more During development the opercular series is known to be one of the first bone structures to form. In the three-spined stickleback the opercular series is seen forming at around seven days after fertilization. Within hours the formation of the shape is visible … See more WebOperculum: The operculum is the bony flap that protects the gills from harm. It opens and closes to allow water to pass over the gills. Pectoral Fin: The pectoral fin allows for … teams call cutting out
Gill - Wikipedia
WebMar 22, 2024 · What is the function of a fish’s operculum? Operculum: The operculum is the bony flap that protects the gills from harm. It opens and closes to allow water to pass … WebA variety of animals possess an operculum. Fish have opercula over their gills to help them breathe and to protect these vulnerable soft spots. The vertebrate jaw probably originally evolved in the Silurian period and appeared in the Placoderm fish which further diversified in the Devonian. Jaws are thought to derive from the pharyngeal arches that support the gills in fish. The two most anterior of these arches are thought to have become the jaw itself (see hyomandibula) and the hyoid arch, which braces the jaw against the braincase and increases mechanical efficiency. While there is no fossil evidence directly to supp… spa bath and body products