Internal Structure of chondrichthys heart
Internal Structure of bony fish heart
Circulatory mechanism
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The deoxygenated blood collected by the
veins accumulates in the sinus venosus,
before entering the heart. Blood first enters
the atrium of the heart, which is a large
chamber. Then it enters the ventricle, from
where it is pumped into the tube, bulbus
arteriosus. Through bulbus arteriosus, the
blood reaches the aorta and then the gills.
They facilitate the exchange of gases, i.e.
absorption of oxygen from water and
elimination of carbon dioxide. Then the
oxygenated blood is transported throughout
the body with the help of blood vessels.
Blood facilitates the transport of oxygen and
nutrients. It also collects carbon dioxide
which is again transported to the heart and
then to the gills, to be removed from the
body.
Artery system in Bony fish
Blood cells of fishes
Erythrocyte (a), normal (b) and activated (c) thrombocytes, neutrophil of trout
(d), heterophil of shark (e), eosinophil (f), monocyte (g), basophil (h), and
lymphocyte (i).
The blood in fishes is red in
color and consist of fluid
plasma and blood cells. Red
Blood cells, White Blood
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