Hollow, muscular organ located in the center of the chest; pumps blood into the circulatory system

• Heart

• Lung

• Kidneys

• Vessels

Sheet of muscle beneath the lungs and above the abdomen that contracts and relaxes to help the chest expand so a person can inhale or exhale

• Lungs

• Bronchi

• Diaphragm

• Throat

Two air passages, each of which connects the trachea to a lung

• Diaphragm

• Veins

• Lungs

• Bronchi

The exchange of oxygen and carbon dioxide between the body and the air around it is called respiration.

• True

• False

Blood vessels that carry oxygen-rich blood.

• Plasma

• Veins

• Arteries

• Capillaries

Small arteries that deliver oxygen and nutrients to cells and pick up cells' waste.

• Veins

• Plasma

• Arteries

• Capillaries

Liquid part of blood.

• Plasma

• Veins

• Arteries

• Capillaries

Blood vessels that carry oxygen-poor blood

• Capillaries

• Veins

• Arteries

• Plasma