The Function. To carry nutrients and oxygen to and remove waste from the cells of the body.

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2 The Function To carry nutrients and oxygen to and remove waste from the cells of the body.

3 What makes up the circulatory system? 1. Heart 2. Blood 3. Blood vessels

4 Blood travels from the heart to the body through blood vessels.

5 There are 3 types of blood vessels: 1. ARTERY 2. VEIN 3. CAPILLARY

6 What is in the red blood cells digested food white blood cells oxygen waste (urea) carbon dioxide platelets plasma hormones

7 The Blood red blood cell white blood cell platelets plasma

8 Red Blood Cells - a biconcave disc that is round and flat without a nucleus - contain hemoglobin, a molecule specially designed to hold oxygen and carry it to cells that need it. - can change shape to an amazing extent, without breaking, as it squeezes single file through the capillaries.

9 White Blood Cells There are many different types and all contain a big nucleus. The two main types are the lymphocytes and the macrophages. Macrophages eat and digest microorganisms. Some lymphocytes fight disease by making antibodies to destroy invaders by dissolving them. other lymphocytes make antitoxins to break down poisons.

10 Plasma A yellow-colored liquid that carries the cells and the platelets which help blood clot. It also contains useful things like: carbon dioxide glucose amino acids proteins minerals vitamins hormones waste materials like urea.

11 Platelets Platelets are bits of cell broken off larger cells. Platelets produce tiny fibrinogen fibers to form a net. This net traps other blood cells to form a blood clot.

12 The Heart VEINS bring blood toward the heart ARTERIES - carry blood away from the heart Now let s look inside the HEART

13 Aorta The Heart

14 Basic Heart RA LA RV LV 4 chambers: - 2 atria (A) - 2 ventricles (V)

15 How does the Heart work? (9 steps) STEP ONE Deoxygenated blood from body travels through VENA CAVA to the heart Vena Cava is the largest vein in the body.

16 STEP TWO Right Atrium blood from the body The heartbeat begins when the heart muscles relax and blood flows into the atria. Both atria fill with blood at the same time. Remember: Blue NO oxygen Red has oxygen

17 STEP THREE Right Ventricle The atria then contract and the valves open to allow blood into the ventricles. Both ventricles fill with blood at the same time.

18 STEP FOUR Lungs The valves close to stop blood flowing backwards. The ventricles contract forcing the blood to leave the heart and go to the lungs. At the same time, the atria relax and fill with blood.

19 STEP FIVE Blood picks up oxygen Gas exchange occurs in the lungs where blood picks up oxygen.

20 STEP SIX Left Atrium Blood now has OXYGEN blood from the body blood from the lungs The heart beat begins when the heart muscles relax and blood flows into the atria. Both atria fill with blood at the same time. Remember: Blue NO oxygen Red has oxygen

21 STEP SEVEN Left Ventricle The left ventricle is the strongest chamber in the heart because it has to pump blood to the whole body.

22 STEP EIGHT Oxygenated blood travels from heart through AORTA Aorta transports oxygenated blood to all parts of the body. Aorta is the largest artery in the body.

23 STEP NINE Blood travels through body to organs and drops off oxygen.

24 Our circulatory system is a double circulatory system. This means it has two parts parts. Lungs the right side of the system deals with deoxygenated blood. Body cells the left side of the system deals with oxygenated blood.

25 Aorta Superior Vena Cava R Pulmonary Artery R Pulmonary Veins R Atrium Tricuspid Valve R Ventricle Inferior Vena Cava L Pulmonary Artery L Pulmonary Veins L Atrium Mitral Valve Aortic Valve L Ventricle Descending Aorta

26 Tuesday 4/23/13 Pick up a red & blue colored pencil or marker Which type of muscle would be found in the large intestines? How do you know?

27 Aorta Superior Vena Cava R Pulmonary Artery R Pulmonary Veins R Atrium Tricuspid Valve R Ventricle Inferior Vena Cava L Pulmonary Artery L Pulmonary Veins L Atrium Mitral Valve Aortic Valve L Ventricle Descending Aorta

Chapter 16: Circulation

Chapter 16: Circulation Section 1: The Body s Transport System Beating Heart Cardiac muscle is Striated and branched Under involuntary control by the brain stem Functions of the Cardiovascular System 1.