1. The Circulatory System Getting oxygen and nutrients where they need to be!

2. Circulatory System: The Video Clip

3. Circulatory System: The Function To deliver oxygen and nutrients to cells To deliver oxygen and nutrients to cells To remove wastes from cells and deliver to excretory organs (kidneys and lungs) To remove wastes from cells and deliver to excretory organs (kidneys and lungs)

4. Circulatory System: Vocabulary Oxygenated Oxygenated  Contains oxygen Deoxygenated Deoxygenated  Contains little or no oxygen Pulmonary: Pulmonary:  Vessels dealing with the LUNGS Systemic: Systemic:  Vessels dealing with the BODY Coronary: Coronary:  Vessels dealing with the HEART itself

5. Circulatory System: The Parts Heart: Heart:  Muscle that pumps blood to body AND lungs Arteries: Arteries:  THICK vessels that carry blood AWAY from heart  TO lungs or TO body Veins: Veins:  THIN vessels that carry blood TO heart  FROM lungs or FROM body Capillaries: Capillaries:  TINY, TINY blood vessels that connect arteries to veins  GAS EXCHANGE OCCURS IN CAPILLARIES!

6. Heart: The Video Clip

7. Circulatory System: The Heart Pericardium: Pericardium:  Protective sac that surrounds the heart Myocardium (heart muscle): Myocardium (heart muscle):  Contractions pump blood through heart Septum: Septum:  Thick wall that separates the two sides of the heart

8. Circulatory System: The Heart con’t… Atrium (pl. atria): Atrium (pl. atria):  Two UPPER chambers of the heart  Right atrium receives blood from the body  Left atrium receives blood from the lungs Ventricles: Ventricles:  Two LOWER chambers of the heart  Right ventricle receives blood from the right atrium  Left ventricle receives blood from the left atrium Valves: Valves:  Prevent “backflow” of blood  Locations: Between atrium and ventricle Between atrium and ventricle Between ventricles and major arteries Between ventricles and major arteries Throughout blood vessels in the body Throughout blood vessels in the body

9. Blood Vessels: The Video Clip

10. Circulatory System: Arteries Blood vessels that carry blood AWAY from the heart to body or lungs Blood vessels that carry blood AWAY from the heart to body or lungs Major arteries: Major arteries:  AORTA: Carries OXYGENATED blood from LEFT VENTRICLE to the BODY Carries OXYGENATED blood from LEFT VENTRICLE to the BODY  PULMONARY ARTERIES: Carry DEOXYGENTATED blood from RIGHT VENTRICLE to LUNGS Carry DEOXYGENTATED blood from RIGHT VENTRICLE to LUNGS ONLY ARTERIES IN BODY THAT CARRY DEOXYGENTATED BLOOD! ONLY ARTERIES IN BODY THAT CARRY DEOXYGENTATED BLOOD!

11. Circulatory System: Veins Blood vessels that carry blood TO heart from body or lungs Blood vessels that carry blood TO heart from body or lungs Major veins: Major veins:  SUPERIOR VENA CAVA: Carries DEOXYGENATED blood from UPPER BODY to the RIGHT ATRIUM Carries DEOXYGENATED blood from UPPER BODY to the RIGHT ATRIUM  INFERIOR VENA CAVA: Carries DEOXYGENATED blood from LOWER BODY to the RIGHT ATRIUM Carries DEOXYGENATED blood from LOWER BODY to the RIGHT ATRIUM  PULMONARY VEINS: Carry OXYGENATED blood from the LUNGS to the LEFT ATRIUM Carry OXYGENATED blood from the LUNGS to the LEFT ATRIUM ONLY VEINS IN BODY THAT CARRY OXYGENATED BLOOD! ONLY VEINS IN BODY THAT CARRY OXYGENATED BLOOD!

12. The Blood’s Journey: The Video Clip

13. Diagram of Heart and Blood Flow (bicuspid) (semilunar)