Webgill. 1. 1. the respiratory organ in many aquatic animals, consisting of a membrane or outgrowth well supplied with blood vessels. External gills occur in tadpoles, some … WebOct 4, 2024 · The Basics. Nudibranchs are an order of marine gastropod consisting of more than 3,000 species. They are soft-bodied, slug-like animals many of which are adorned with bright colors and extravagant …

Gill respiratory system Britannica

WebJan 10, 2024 · Overview. “Concentration” refers to how much of a solute is in a given amount of solvent. A corner of a water tank that has just had salt dumped into it would have a much higher concentration of salt than the … WebThe salt is replaced with the help of mitochondria-rich cells in the gills. These cells absorb salt into the blood from the surrounding water. Osmoregulation in Marine Fish Compared to freshwater fish, marine fish face the opposite problem. They have a higher concentration of water in their blood than their surrounding environment. choc stagflationniste

Fish gill - Wikipedia

WebDefine gills. gills synonyms, gills pronunciation, gills translation, English dictionary definition of gills. gill1 A fish breathes by swallowing water and passing it through gill … WebEvolution of Spiracles. Likely they evolved from gill openings in the fishes. In jawless fish, these were simply the first gill openings behind the mouth. This gill opening separated … WebFeb 17, 2024 · Definition & Etymology of The Term ''Gills'' Gills are an essential organ for many aquatic animals in order for them to survive. Even some worms, mollusks, and … choc stands for