2.  Transports food/ nutrients, oxygen, and chemicals to the cells.  Removes Carbon Dioxide and waste from the cells.  Transports cells to attack pathogens.

3.  The muscle that transports the needed materials throughout the body.  Pumps about 5 liters every minute.  Nerve tissue on your heart controls heart rhythm

4.  Heart  The tissue that separates the heart the two sides is the Septum.  Right upper- Right Atrium low in Oxygen comes from the body  Flows down to the right Ventricle through a valve (does not allow back flow).  Blood moves to lungs to exchange Carbon Dioxide for Oxygen (Diffusion) at the Alveoli.  Left Atrium receives Oxygen rich blood from lungs  Passes through valve to Left Ventricle and out to body

5.  Arteries (Bright Red)  Blood vessels that carry blood away  Largest Artery is the Aorta  Branch into small, flexible arteries then to capillaries.

6.  Veins- have valves to prevent back flow.  Dark Red and low in oxygen  Blood is pushed back to the heart

7.  Capillaries  Very thin-walled to allow diffusion  Red blood cells pass single file  Function to give up oxygen and take waste away

8.  Blood  Contains four component  Red blood cells, White blood cells, platelets, and plasma

9.  Plasma  Yellowish fluid  90% water, 10% protein, fats, salts, and gases  Regulates amount of water entering and leaving cell  Antibodies fight off bacteria, viruses, and other substances  Contains clotting factors

10.  Red Blood Cells  Produced in Bone marrow and live about 120 days  2 million die per second  Contains Iron protein (Hemoglobin)attaches to oxygen easily

11.  White Blood cells  Larger than red blood cells and last months or years  Develop in Bone marrow  Function is to protect the body from pathogen by surrounding it and digesting it.  Produces antibodies

12.  Platelets  Collects around cuts  Produces fibrin that burst apart to form clotting agents  Catches blood cells and plasma to create clot/scab  They are fragments of cells that are produced in the bone marrow  Live 10 days