The Circulatory System

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Circulatory System.

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Presentation transcript:

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

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

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

Circulatory System: The Parts Heart: Muscle that pumps blood to body AND lungs Arteries: THICK vessels that carry blood AWAY from heart TO lungs or TO body Veins: THIN vessels that carry blood TO heart FROM lungs or FROM body May have valves to keep blood flowing towards the heart Capillaries: TINY, TINY blood vessels that connect arteries to veins One cell thick to allow for diffusion GAS EXCHANGE OCCURS IN CAPILLARIES!

Comparing the Blood Vessels

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

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

Some fun with the heart http://www.youtube.com/watch?v=q0s-1MC1hcE&feature=related http://www.youtube.com/watch?v=PIyHkONpH40

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

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

Diagram of Heart and Blood Flow

Diagram of Heart and Blood Flow