The heart is the biggest organ in the circulatory system. It pumps blood throughout the body.
The Circulatory System has arteries and veins.
Arteries and veins carry blood around the body and into the heart.
In arteries blood flows from the heart to the rest of the body.
In veins blood flows from the body to the heart.
Capillaries are any of the fine branching blood vessels that form a network between the arterioles and venules.
The red Blood Cells deliver oxygen to different parts of the body.
The Circulatory System helps circulate blood throughout the body and moves lymph to get rid of unwanted materials.
Hypertension is when you get too high of a blood pressure. It causes the heart to work harder and can lead to such problems as a heart attack, a stroke, or kidney failure,
The Circulatory System works with the Respiratory System by the lungs in the Respiratory System pumps oxygen into the heart and blood vessels.
The heart beats around 3 billion times in an average person's life.
About 8 million blood cells die in the human body every second, and the same number are born each second.
It takes about 20 seconds for a red blood cell to circle the whole body.
An adult body contains about 9 pints of blood.
If you were able to lay all the veins, arteries, and capillaries in an adult body, end-to-end, they would stretch out over 62,500 miles.
