carry blood BACK to the heart

place where gas and food nutrients exchange takes place 

Are larger than erythrocytes

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 small arteries that connect larger arteries with capillaries

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

contraction of the heart muscle

The cardiac cycle consists of two parts:

Carries the blood throughout the body

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

Ventricles contract while ___________relax

Movement of blood through the tissues of the heart 

carry blood AWAY from heart

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

 have valves that prevent the backflow of blood.

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

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

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

Liquid portion of blood

digest/ engulf the bacteria/ virus

are tiny blood vessels that connects arteries to veins

relaxation of the heart muscle

a substance that is constantly flowing through our bodies

carry blood BACK toward your heart 

- produce antibodies

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

are blood cells that help stop bleeding 

is the main artery leaving the heart

are responsible for carrying oxygen and carbon dioxide

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

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

Atriums contract while _____ relax

carry oxygenated blood from lungs back to the heart

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

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

Heart is made up of four (4) chambers

A closed network of tubes

They function in the cellular immune response

limit flow to a single direction

Have a nucleus, and lack hemoglobin 

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

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