Fish gills are organs that allow fish to breathe underwater. Most fish exchange gases like oxygen and carbon dioxide using gills that are protected under gill covers (operculum) on both sides of the pharynx (throat). Gills are tissues that are like short threads, protein structures called filaments. These filaments have … See more Air breathing fish can be divided into obligate air breathers and facultative air breathers. Obligate air breathers, such as the African lungfish, are obligated to breathe air periodically or they suffocate. Facultative air … See more Lampreys and hagfish do not have gill slits as such. Instead, the gills are contained in spherical pouches, with a circular opening to the outside. Like the gill slits of higher fish, each pouch … See more Although most fish respire primarily using gills, some fish can at least partially respire using mechanisms that do not require gills. In … See more • Aquatic respiration • Book lung • Gill raker • Gill slit See more • Fish gill respiration • Fish gill structure In bony fish, the gills lie in a branchial chamber covered by a bony operculum (branchia is an … See more Sharks and rays typically have five pairs of gill slits that open directly to the outside of the body, though some more primitive sharks have six or seven pairs. Adjacent slits are separated by a cartilaginous gill arch from which projects a long sheet-like septum, … See more Fish gills are the preferred habitat of many ectoparasites (parasites attached to the gill but living out of it); the most commons are monogeneans and … See more WebThe average human adult has around 480 – 500 million alveoli in their lungs. This equals a surface area of 40 – 75 m 2. The large number of alveoli increases the surface area available for oxygen and carbon dioxide to diffuse across. Extensive capillary network. The walls of the capillaries are only one cell thick and these cells are ...
Animal Gas Exchange and Transport Organismal Biology
WebFish exchange gases between the blood and the environment using gills. Gills are thin filamentous, vascular structures located just behind the head. Fish obtain the oxygen they need from the water by means of gills. Gills are membranous structures supported by cartilaginous or bony struts. WebThe exchange surfaces in fish are gills. Fish gills Water is taken in through the fish's mouth, passes over the gills, and then out under the operculum Exchange of gases in fish is... high density analog input
Fish - Respiratory and circulatory systems Britannica
WebMost fishes exchange dissolved oxygen and carbon dioxide in water using gills which lie behind and to the side of the mouth cavity. The circulatory system consists of the heart, … WebTracheal System of an Insect. All insects possess a rigid exoskeleton with a waxy coating that is impermeable to gases. Insects have evolved a breathing system that delivers … WebThis means the water flows through the gills in one direction, allowing for more efficient gas exchange than if the water had to go in and out the same way. This is important for fish becaus of the low oxygen concentration in … high density amorphous ice