What type of heart do humans possess?

Step-by-step solution

Heart, the mesodermally derived organ, is situated in the thoracic cavity, in between the two lungs, slightly tilted to the left. It has the size of a clenched fist. It is protected by a double walled membranous bag, pericardium, enclosing the pericardial fluid . Our heart has four chambers , two relatively small upper chambers called atria and two larger lower chambers called ventricles