General Science 14

This is composed of the heart and blood vessels and transports oxygen and nutrients to all the tissues in the body.

• Circulatory system

• Respiratory system

• Digestive system

• Cardiovascular system

This is composed of the lungs and allows the body to take in oxygen and then get rid of carbon dioxide.

• Circulatory system

• Respiratory system

• Cardiovascular system

• Digestive system

These blood vessels will always carry blood back to the heart, and mostly deoxygenated blood.

• Veins

• Arteries

• Capillaries

• Blood vessels

These blood vessels will always carry blood away from the heart, mostly oxygenated blood.

• Veins

• Arteries

• Capillaries

• Platelets

These are tiny, thin-walled blood vessels that allow for the actual exchange of gases and nutrients.

• Veins

• Arteries

• Capillaries

• Alveoli

This blood has just left the heart and is rich in fresh oxygen.

• Oxygenated blood

• Deoxygenated blood

• Red blood

• Rich blood

This blood is on it's way back to the heart and is low on oxygen, needing to be replenished.

• Oxygenated blood

• Deoxygenated blood

• Platelets

• Capillary blood

This organ's primary job is to pump blood to the lungs to get re-oxygenated, or to the body needing to be replenished with oxygen and nutrients.

• Heart

• Aorta

• Brain

• Liver

Blood leaves the heart through this artery, which is the thickest artery in the body because of all the force it has leaving the heart.

• Aorta

• Pulmonary artery

• Pulmonary vein

• Inferior vena cava

The cycle of a heartbeat: the contraction and relaxation of both atria and the contraction and relaxation of both ventricles is referred to as this:

• Pacemaker

• Cardiac cycle

• Respiratory cycle

• Heart cycle