DO NOW: What are the three types of blood vessels and their functions/jobs?

 makes up ~8% of your body’s total mass  has four important functions 1) carries oxygen and carbon dioxide to and from the lungs 2) carries waste products to kidneys to be removed

 3. ransports nutrients and other substances to your body cells 4. cells and molecules in blood fight infections and help heal wounds

 Plasma  liquid part of blood  is mostly water  makes up more than ½ the volume of blood

 Red blood cells  contain hemoglobin, which is a molecule that carries oxygen and carbon dioxide  have a life span of ~120 days  are made in the center of long bones

 White blood cells  fight bacteria, viruses and other invaders of your body your body reacts to invaders by increasing the number of white blood cells  have a life span of a few days to many months

 Platelets  Irregular shaped cell fragments that help clot blood  have a life span of 5-9 days

When you cut yourself: 1. Platelets stick to the wound and release chemicals called clotting factors. 2. Clotting factors cause threadlike fibers called fibrin to form a sticky net. 3. The net traps escaping blood cells and plasma, and forms a clot to stop more blood from escaping. 4. Clot becomes hard and skin cells begin the repair process under the scab. 5. Eventually, the scab is lifted off.

DO NOW: What are the four components of blood? What does each part do?

 genetic condition in which a person’s plasma lacks one of the clotting factors that begins the clotting process

 there are four types of blood: A, B, AB, O  each blood type has specific antibodies in it’s plasma  Antibodies: proteins that destroy substances that do not belong in or are not part of your body

 because of antibodies, certain blood types cannot be mixed, which limits the blood transfusion possibilities

TypeABABO A B O

TypeCan ReceiveCan Donate To A B AB O

 a chemical identification tag in blood, which is inherited  If a Rh factor is on the red blood cells, a person’s blood is called Rh-positive  If the Rh factor is not present, the person’s blood is Rh-negative **Rh-positive and Rh-negative blood cannot be mixed**

 Anemia  body tissues cannot get enough oxygen and are unable to carry on their usual activities  Leukemia  disease that produces immature white blood cells that don’t fight infections well