Heart
These cells in the heart adjust the rate of the heartbeat to correspond to the body's oxygen needs.
Pacemaker
Blood flowing into the right atrium contains a lot of this.
Carbon dioxide
These are the blood vessels that carry blood away from the heart.
Arteries
This is the watery part of your blood.
Plasma
This is where fluid that leaks from the capillaries into the surrounding tissue winds up.
Lymphatic system
These structures prevent blood from flowing backwards.
Valves
This is where materials are exchanged between the blood and body cells.
Capillaries
This is a condition in which the artery walls thicken as a result of buildup of fatty materials.
Atherosclerosis
These are the germ fighters in your blood.
White blood cells
This is another name for high blood pressure.
Hypertension
This chamber pumps oxygen poor blood to the lungs.
Right ventricle
This is the part of blood that carries oxygen to the body cells.
Red blood cells
This is how many meters of blood vessels you have in your body.
100,000
These are the blood vessels that carry blood back to the heart.
Veins
This is part of your blood is 90% water.
Plasma
Systolic/diastolic
This is the part of the blood that controls clotting.
Platelets
These are the three parts of the circulatory system.
Heart, blood, blood vessels
2 million of these die every second.
Red blood cells
These cells in the blood fight disease.
White
These are the chambers of the heart.
Right/left ventricles and atriums
This is what determines a person's blood type.
Marker molecules on red blood cells
These are the three types of blood vessels.
Veins, arteries, capillaries
I am the largest artery in the body and I receive my blood from the left ventricle.
Aorta
This blood type is known as the universal donor.
O