Human blood is made up of plasma, red blood cells, white blood cells, and platelets.
The average adult human has about 5 liters of blood in their body.
Red blood cells, also known as erythrocytes, contain a protein called hemoglobin that binds to oxygen and helps transport it throughout the body.
White blood cells, also known as leukocytes, play a crucial role in the immune system by protecting the body against infection and disease.
Platelets, also known as thrombocytes, help the blood to clot in case of injury.
Blood is constantly flowing through the body, with the heart pumping it to all the organs and tissues.
Blood is red because of the high concentration of iron in hemoglobin.
Blood is constantly being produced in the bone marrow.
Blood type is determined by the presence or absence of certain antigens on the surface of red blood cells.
Blood donation can save lives, as it is used for a variety of medical treatments including surgeries, cancer treatments, and for accident or burn victims.
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