Internal Structure of Human Heart

Human heart is composed of _____ (four/two) chambers.

_____ (Sinoatrial/Atrioventricular) node is the pacemaker of the heart.

Mention the comparative anatomy of vertebrate heart.

The relaxation of the heart chambers is called _____.

The contraction of the heart chambers is called _____.

In fishes, the blood is oxygenated in the _____.

The oxygen-rich blood goes from the lungs to the _____.

_____ is a muscular organ that pushes the blood around the body.

What is the location of the human heart in the body?

The prevention of backflow of blood inside the heart during contraction is done by

The heart is a part of 

The partition between the _____ in a human heart avoids the mixing of blood rich in oxygen with the blood rich in carbon dioxide.

In humans, the heart is located in the _____ cavity.

What is the normal pulse rate of a human at resting position?

The number of chamber(s) present in human heart are

Write the correlated terms?

Diastole phase : _____ :: Pulmonary circuit : Systematic circuit.