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Fish anatomy is the study of the form or morphology of fish. It can be contrasted with fish physiology , which is the study of how the component parts of fish function together in the living fish. [ 1 ]
This is known as single cycle circulation. The heart of fish is therefore only a single pump (consisting of two chambers). Fish have a closed-loop circulatory system. The heart pumps the blood in a single loop throughout the body. In most fish, the heart consists of four parts, including two chambers and an entrance and exit. [20]
Fish are cold-blooded, and in general their body temperature is the same as that of their surroundings. They gain and lose heat through their skin, and regulate their circulation in response to changes in water temperature by increasing or reducing the blood flow to the gills.
In many fish, a rete mirabile helps fill the swim bladder with oxygen, increasing the fish's buoyancy. The rete mirabile is an essential [ 8 ] part of the system that pumps dissolved oxygen from a low partial pressure ( P O 2 {\displaystyle {P_{\rm {O_{2}}}}} ) of 0.2 atmospheres into a gas filled bladder that is at a pressure of hundreds of ...
The gastrovascular cavity is the primary organ of digestion and circulation in two major animal phyla: the Coelenterates or cnidarians (including jellyfish and corals) and Platyhelminthes (flatworms). The cavity may be extensively branched into a system of canals.
The fish all open their mouths and opercula wide at the same time (the red gills are visible in the photo below—click to enlarge). The fish swim in a grid where the distance between them is the same as the jump length of the copepods.
These fish use their electric discharges for navigation, communication, mating, defence, and in strongly electric fish also for the incapacitation of prey. The electric organs of two strongly electric fish, the torpedo ray and the electric eel were first studied in the 1770s by John Walsh , Hugh Williamson, and John Hunter .
Download as PDF; Printable version; ... water circulation around the sea anemone, [7] and it has been suggested that their bright coloring might lure small fish ...