It is the organ system that is responsible for transporting nutrients and oxygen throughout the entire body

The Circulatory System is divided into three (3) major parts:

Heart is made up of four (4) chambers

The cardiac cycle consists of two parts:

Atriums contract while _____ relax

Ventricles contract while ___________relax

limit flow to a single direction

includes atrial contraction and relaxation, ventricular contraction and relaxation, and a short pause

a substance that is constantly flowing through our bodies

carries nutrients, water, oxygen and waste products to and from your body cells

Liquid portion of blood

are responsible for carrying oxygen and carbon dioxide

pick up oxygen in the lungs and transport it to all the body cells 

After delivering the oxygen to the cells it gathers up the carbon dioxide and transports carbon dioxide back to the lungs where it is removed from the body when we exhale

Are larger than erythrocytes

Have a nucleus, and lack hemoglobin 

They function in the cellular immune response

digest/ engulf the bacteria/ virus

- produce antibodies

are blood cells that help stop bleeding 

A closed network of tubes

Carries the blood throughout the body

carry blood AWAY from heart

place where gas and food nutrients exchange takes place 

carry blood BACK to the heart

 are blood vessels that carry oxygen rich blood AWAY from the heart

are able to expand and contract with the heart as it pushes blood through the body

is the main artery leaving the heart

is the only artery that carries deoxygenated blood. The pulmonary artery carries deoxygenated blood to the lungs 

are small arteries that connect larger arteries with capillaries

carry blood BACK toward your heart 

carry blood from capillaries to the heart. Blood in veins is deoxygenated but with the exception of the pulmonary veins.

carry oxygenated blood from lungs back to the heart

are smaller veins that gather blood from capillary beds into veins.

 have valves that prevent the backflow of blood.

are tiny blood vessels that connects arteries to veins

are so small that it takes ten of them to equal the thickness of a human hair

Movement of blood from the heart, to the lungs, and back to the heart

Movement of blood through the tissues of the heart 

Movement of blood from the heart to the rest of the body, excluding the lungs

contraction of the heart muscle

relaxation of the heart muscle