The inside of your is divided into four chambers separated by one-way gateways called valves.
The upper left Atrium is a empty chamber that gets oxygen-rich blood from the pulmonary vein before giving it to the left ventricle. The upper right Atrium is also an empty chamber that gets blood lacking oxygen from the vena cava before sending it to the right ventricle.

There’s a special group of cells on the heart called a node generates the beating process.
the artery carries blood lacking oxygen. The vena cava carries blood lacking oxygen to the lower part of your body. Valves are a one way biological gateway that makes sure blood flows in the right direction.

There’s a special group of cells on the heart called a node generates the beating process.
the artery carries blood lacking oxygen. The vena cava carries blood lacking oxygen to the lower part of your body. Valves are a one way biological gateway that makes sure blood flows in the right direction.

There’s a special group of cells on the heart called a node generates the beating process.
the artery carries blood lacking oxygen. The vena cava carries blood lacking oxygen to the lower part of your body. Valves are a one way biological gateway that makes sure blood flows in the right direction.