Circulatory
These blood vessels carry blood away from the heart.
What are arteries?
This is the main organ of the respiratory system and is responsible for breathing.
What are the lungs?
This gas enters the blood in the lungs.
What is oxygen?
This other body part is approximately the same size as your heart.
What is your fist?
This part of the blood carries oxygen.
What are red blood cells?
These blood vessels carry blood to the heart.
What are veins?
Expansion and contraction of this muscle below the lungs helps with breathing.
What is the diaphragm?
This waste gas leaves the blood and is exhaled.
What is carbon dioxide?
The lower chambers of the heart are called these.
What are the ventricles?
These blood cells help fight infection.
What are white blood cells?
These tiny blood vessels allow exchange of gases and nutrients.
What are capillaries?
Air travels from the trachea into these two branching tubes.
What are the bronchi (bronchioles)?
Gas exchange occurs because molecules move from high to low concentration by this process.
What is diffusion?
The upper chambers of the heart are called these.
What are the atria (atrium)?
Your blood is mostly made of this liquid portion that transports nutrients and wastes.
What is plasma?
The right ventricle pumps blood to these organs.
What are the lungs?
These tiny air sacs are where gas exchange occurs.
What are alveoli?
Red blood cells contain this protein that carries oxygen and gives them their red color.
What is hemoglobin?
This side of the heart pumps oxygen-rich blood to the body.
What is the left side?
These cell fragments help blood clot.
What are platelets?
This risk factor for cardiovascular disease increases risk the most.
What is smoking?
This tube is commonly called the windpipe.
What is the trachea?
This term refers to anything involving the lungs.
What is pulmonary?
These structures prevent blood from flowing backward in the heart.
What are valves?
This blood type is known as the universal donor, because any type can receive it. It's caused by homozygous recessive genes.
What is type O?