The heart
This muscular organ pumps blood throughout your body continuously.
The heart.
These red cells carry oxygen throughout the body using a special protein called hemoglobin
Erytrocytes
The primary organ of the respiratory system used for breathing in air.
lungs
The gas our bodies take in from the air to survive and produce energy.
oxygen
A common condition where airways narrow and swell, making it hard to breathe.
asthma
The number of chambers found inside the human heart
4
These blood cells act like tiny soldiers to fight off germs, infections, and diseases
Leukocytes
The dome-shaped muscle under your lungs that moves down when you inhale.
diaphragm
The waste gas produced by body cells that we breathe out.
carbon dioxide
An infection that inflames the air sacs in one or both lungs, often filling them with fluid.
pneumonia
These upper two chambers of the heart receive blood coming back from the body and lungs
atria/atrium
Tiny cell fragments that form clots to stop bleeding when you get a cut
Platelets
Also known as the windpipe, this tube carries air from your throat to your lungs.
trachea
Oxygen enters the bloodstream through the capillaries surrounding the alveoli.
capillaries
A high blood pressure condition that forces the heart to work much harder to pump blood.
hypertension
These lower two powerful chambers pump blood out to the lungs and the rest of the body.
ventricles
The yellowish liquid part of blood that carries nutrients, hormones, and waste
Blood plasma
Tiny hair-like structures in your airways that sweep away dust, dirt, and mucus.
cilia
The organ that oxygenated blood travels to right after leaving the lungs.
heart
A blockage in a coronary artery that cuts off blood supply to part of the heart muscle.
heart attack
The main blood vessel that carries oxygen-rich blood away from the heart to the body
Aorta
The microscopic blood vessels where oxygen and nutrients pass directly into body cells
Capillaries
Microscopic air sacs at the end of the lungs where gas exchange actually takes place.
alveoli
The process where oxygen and carbon dioxide swap places between the air sacs and blood.
gas exchange
A respiratory illness usually caused by a virus that causes fever, chills, and body aches.
influenza