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www.petmd.com/fish/care/evr_fi_cardiovascular_system_in_fish

A fish’s cardiovascular system comprises of two main parts: the heart and the system of pipes (veins, arteries and capillaries) that carry blood throughout the body. Every organ and cell in the fish’s body is connected to this system, which serves a wide variety of purposes.

biologywise.com/circulatory-system-of-fish

The circulatory system of fish is quite simple. It consists of a heart, blood, and blood vessels. The heart of a fish is a simple muscular structure that is located behind (and below) the gills. It is enclosed by the pericardial membrane or pericardium.

courses.lumenlearning.com/.../chapter/overview-of-the-circulatory-system

Overview of the Circulatory System. The Role of the Circulatory System. The circulatory systems is a network of blood vessels supplying the body with oxygen and nutrients, while removing carbon dioxide and waste. Learning Objectives. ... Fish Circulatory Systems.

earthlife.net/fish/blood.html

The Circulatory System in Fish. As in other vertebrates the circulatory system of fish is comprised of both static and dynamic components. The dynamic part is the blood with all its constituent parts that flows continuously around the fish's body. The static parts are the heart, the veins and arteries leading to and from it and the capillaries ...

en.wikipedia.org/wiki/Circulatory_system

The circulatory system, also called the cardiovascular system or the vascular system, is an organ system that permits blood to circulate and transport nutrients (such as amino acids and electrolytes), oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body to provide nourishment and help in fighting diseases, stabilize temperature and pH, and maintain homeostasis.

esi.stanford.edu/circulation/circulation7.htm

The fish circulation As seen on the previous page, the major difference between the mammalian and fish circulatory system. The fish heart needs to generate the driving pressure for both the gills (lungs in mammals) and the body since they are connected in series, as seen in the figure to the left. ...

www.britannica.com/animal/fish/The-respiratory-system

Fish - The respiratory system: Oxygen and carbon dioxide dissolve in water, and most fishes exchange dissolved oxygen and carbon dioxide in water by means of the gills. The gills lie behind and to the side of the mouth cavity and consist of fleshy filaments supported by the gill arches and filled with blood vessels, which give gills a bright red colour.

www.britannica.com/animal/fish

opah (Lampris guttatus) The warm-bloodedness of the opah (Lampris guttatus) results from a heat exchange system in the fish's gills. Heat generated by muscle movement is transported in deoxygenated blood to the gills, which distribute the heat to oxygenated blood, which is then pumped by the heart to the rest of the fish's body.

seaworld.org/animals/all-about/bony-fish/anatomy-and-physiology

Cardiovascular System. A bony fish's heart has two chambers: an atrium and a ventricle. The venous side of the heart is preceded by an enlarged chamber called the sinus venosus. The arterial side of the heart is followed by a thickened muscular cavity called the bulbus arteriosus.

www.youtube.com/watch?v=lZUiBfj7RxA

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