What Does the Heart Do?The heart is a pump, usually beating about 60 to 100 times per minute. With each heartbeat, the heart sends blood throughout our bodies, carrying oxygen to every cell. After delivering the oxygen, the blood returns to the heart. The heart then sends the blood to the lungs to pick up more oxygen. This cycle repeats over and over again.What Does the Circulatory System Do?The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart.The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide. These roadways travel in one direction only, to keep things going where they should.What Are the Parts of the Heart?The heart has four chambers — two on top and two on bottom:The two bottom chambers are the right ventricle and the left ventricle. These pump blood out of the heart. A wall called the interventricular septum is between the two ventricles.The two top chambers are the right atrium and the left atrium. They receive the blood entering the heart. A wall called the interatrial septum is between the atria.

Sure, let's break down the information step by step:

1. Function of the Heart:

   • The heart acts as a pump.
   • It typically beats 60 to 100 times per minute.
   • With each beat, it sends blood throughout the body.
   • The blood carries oxygen to every cell.
   • After delivering oxygen, the blood returns to the heart.
   • The heart then pumps the blood to the lungs to pick up more oxygen.
   • This cycle repeats continuously.

2. Function of the Circulatory System:

   • The circulatory system consists of blood vessels.
   • These vessels carry blood away from and towards the heart.
   • Arteries carry blood away from the heart.
   • Veins carry blood back to the heart.
   • The system transports oxygen, nutrients, and hormones to cells.
   • It also removes waste products like carbon dioxide.
   • The blood vessels ensure one-way travel to maintain proper circulation.

3. Parts of the Heart:

   • The heart has four chambers.
   • There are two chambers on the top and two on the bottom.
   • The bottom chambers are the right ventricle and the left ventricle.
     • These pump blood out of the heart.
     • They are separated by the interventricular septum.
   • The top chambers are the right atrium and the left atrium.
     • These receive blood entering the heart.
     • They are separated by the interatrial septum.