Biology Circulatory/Respiratory Systems

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7 Terms

1
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5 Steps of Gas Exchange

  1. Ventilation

  2. Diffusion

  3. Circulation

  4. Diffusion

  5. Cellular Respiration

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Neg Psi Ventilation

Negative pressure pulls gasses in to the lungs

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How gasses move in/out of the bloodstream

Air travels into the bronchioles and diffuses into/out of capillaries in the alveoli. Partial pressure changes with the concentration of O2 and CO2

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Order of the 5 blood vessels

Arteries, arterioles, capillaries, venules, veins

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Pulmonary Circulation

Oxygen poor blood returning to the heart. Enters right atrium, right ventricle, to the lungs

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Systemic Circulation

Oxygen rich blood returning to the heart. Blood leaves lungs to enter left atrium, left ventricle, and out to the body

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Role of CO2, bicarbonate ions, protons

Regulates breathing rate/inhalation rate