THE HEART OF FISHES, MAMMALS AND REPTILES

THE DIFFERENCES AND THE SIMILARITIES BETWEEN THE HEART STRUCTURES

MAMMALS REPTILES FISHES

There are two atria and two completely divided ventricles

three chambered heart with an incomplete septum partially divides the single ventricle into separate right and left chambers.

Two-chambered heart : an atrium and a ventricle.

It is divided by a complete septum

it is divided by incomplete septum

No septum

Single circulatory pump Double circulatory pump Double circulatory pump

The similarities…

the chambers that receive blood entering the heart are called atria

the chambers responsible for pumping blood out of the heart are called ventricles

THE FUNCTION OF THE BLOOD CELLS(HEMATOCYTE)

erythrocyte : carry oxygen and collect carbon dioxide through the use of hemoglobin

leukocyte: cells in immune system involved in defending the body against the infectious disease.

thrombocytes : helps in the blood clotting