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Circulatory System in Animals

Circulatory System in Animals. Feeding Energy Needs. Why do we need a circulatory system? supplies in _______________________ ______________________ _______________________ ______________________ waste out _______________________ ______________________

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Circulatory System in Animals

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  1. Circulatory Systemin Animals

  2. Feeding Energy Needs • Why do we need a circulatory system? • supplies in • _______________________ • ______________________ • _______________________ • ______________________ • waste out • _______________________ • ______________________ • need to pick up & deliver the supplies & wastes around the body • _______________________

  3. Simpler organisms When your body is only 2-cell layers thick, you can get supplies in and waste out just through ______________ • all cells within easy reach of fluid Jellyfish Hydra

  4. Complex organisms • Circulatory system • made up of 3 parts • organ • _________________ • tissues & cells • _________________ • _____________ • _____________ • _____________ • _________________ • _____________ • _____________

  5. Circulatory systems • All animals have: • muscular pump = ________________ • tubes = ________________ • circulatory fluid = ________________ open closed hemolymph blood

  6. Vertebrate Heart • 4-Chambered heart • ____________ (atrium) • ____________________ • collection chamber • receive blood • __________________ • ____________________ • pump blood out leftatrium rightatrium rightventricle leftventricle

  7. Evolution of circulatory system Not everyone has a 4-chambered heart fish amphibian reptiles birds & mammals 2 chamber 3 chamber 3 chamber 4 chamber V A A A A A A A V V V V V

  8. Lub-dub, lub-dub • 4 valves in the heart • flaps of connective tissue • ___________________________ • Heart sounds • ___________________________ • “Lub” • force blood against closed AV valves • “Dub” • force of blood against semilunar valves • Heart murmur • _________________________________________ • blood squirts backward through valve SL AV AV

  9. Electrical signals • heart pumping controlled by electrical impulses • signal also transmitted to skin = ________ stimulates ventricles to contract from bottom to top, driving blood into arteries allows atria to empty completely before ventricles contract

  10. Cardiac Cycle ventriclesfill How is this reflected in blood pressure measurements? systolic ________ diastolic chambers fill 110 ________ 80 pump(peak pressure) _________________ fill(minimum pressure) ventriclespump

  11. Measurement of blood pressure if systolic > 150 or if diastolic > 90 hypertension =(high blood pressure)

  12. Have a heart?Ask Questions!!

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