What is blood?


When you look at a cut, the blood looks like a red liquid, but it’s actually made up of billions of cells in a pale yellow colored fluid called plasma. There are three main types of blood cells in your body: Red blood cells, white blood cells and platelets.




Red Blood Cells


White Blood Cells 




Why is blood important to the human body?
The blood in our bodies is pumped by the heart through a network of arteries and veins. The body depends on a steady supply of fuel and oxygen to reach its billions of cells. Blood also carries carbon dioxide and other waste materials to the lungs, kidneys, and digestive system; from there they are removed from the body. Without blood, we couldn't keep warm or cool off, we couldn't fight infections, heal wounds and we couldn't get rid of our own waste products.
Blood Type
Four Categories: A, B, AB, O
Refers to the presence or absence of antigens on the red blood cells.
Your blood type is inherited.
Blood can be Rh factor negative or positive.
Rh factor is an inherited blood group on the red blood cells. 85% of people are Rh+.
Most common blood type: O+
Most rare blood type: AB-
Universal Donor O-
A person with O- blood can donate blood to anyone regardless of the recipient’s blood type.
Universal Recipient AB+
A person with this blood type can receive blood from anyone regardless of the donor’s blood type.