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Circulatory system

Circulatory system. YEAR 10 SPORT SCIENCE. CIRCULATORY SYSTEM . The circulatory system is made up of: Heart Blood Blood vessels. CIRCULATORY SYSTEM . Function of Circulatory System: 1. Circulation of blood throughout the body

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Circulatory system

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  1. Circulatory system YEAR 10 SPORT SCIENCE

  2. CIRCULATORY SYSTEM The circulatory system is made up of: • Heart • Blood • Blood vessels

  3. CIRCULATORY SYSTEM Function of Circulatory System: 1. Circulation of blood throughout the body • Supply active muscle with oxygen to assist with breakdown and release of energy during contraction. • Transport blood back to heart. 2. Removal of waste products • By-products of energy production removed by the lungs

  4. CIRCULATORY SYSTEM Circulation of blood • Blood is supplied to active muscles during exercise to provide oxygen for the breakdown of energy. • During exercise, heart pumps faster to keep up with demand of oxygen needed by active muscles for contraction. • This causes an increase in heart rate during exercise.

  5. CIRCULATORY SYSTEM Removal of waste • Through the breakdown of energy during muscle contraction, carbon dioxide (CO²) is formed. • Lactate (lactic acid) is built up during anaerobic exercise. • Blood is transported back to the lungs, where by-products including CO² and lactic acid are removed. • Carbon dioxide and other excretory products are exchanged (exhaled) for oxygen (which is inhaled).

  6. CIRCULATORY SYSTEM Contribution to efficient movement • Lungs and heart work together to pump oxygenated blood to muscles and removal waste products from deoxygenated blood returning to the heart from the muscles. • Trained athletes have lower resting heart rate. • Average resting HR for teenager: 60-70bpm.

  7. BLOOD Blood composition • Plasma • Blood cells Function of blood • Transportation of oxygen to active muscles for energy production, removal of by-products • Protection against infection and dehydration • Temperature regulation and maintenance of body equilibrium- pH

  8. BLOOD VESSELS Blood vessels make up the vascular network through which all blood flows to all parts of the body. • Arteries • Arterioles • Capillaries • Venules • Veins

  9. BLOOD VESSELS Veins and arteries transport blood around the body • Arteries: away from heart • Veins: return blood to heart

  10. Capillaries • Capillaries extent from arterioles to venules • Capillaries supply blood flow to an organ or muscle and allow for the exchange of water, oxygen, carbon dioxide and other waste chemical substances between blood and surrounding tissues. • Capillaries allow for transfer of O² from blood to muscles and removal of CO² from muscles to blood. CO² is then transported in blood to lungs, where it is exhaled, and O² inhaled.

  11. LUNGS • After exercise, deoxygenated blood from muscles is transported to lungs via the heart. • CO² is exhaled from lungs, and O² inhaled. • Oxygenated blood is now transported to the body (active muscles) via heart.

  12. CIRCULATORY SYSTEM Two divisions: • Pulmonary circulation Arteries and veins transport deoxygenated blood between heart and lungs, and returns oxygenated blood back to heart. • (Heart, right side) → Pulmonary arteries → (Lungs) → Pulmonary vein → (Heart, left side) • Systemic circulation Arteries transport oxygenated blood to organs, muscles and tissue around the body, and returns deoxygenated blood back to the heart. • (Heart, left side) → Aorta → Arteries → Arterioles → Capillaries → Venules → Veins → Vena cava → (Heart, right side)

  13. HEART

  14. BLOOD CIRCULATION

  15. CIRCULATORY SYSTEM Blood returning from body via heart: • Right atrium → Right ventricle → Pulmonary artery →Lungs → Pulmonary vein → Left atrium → Left ventricle → Left ventricle → Aorta → Arteries → Arterioles → Capillaries → Venules → Veins → Vena cava

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