Bio Exam Two Notes

Bio Exam Two Notes - Bio Exam Two Notes Chapter 44 KEY...

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Bio Exam Two Notes Chapter 44 KEY CONCEPTS - All vertebrates have a closed circulation, while many invertebrate animals have open circulatory systems - Blood consists of fluid plasma in which circulating blood cells are suspended - Blood leaves the heart in arteries and returns in veins; in between, the blood passes through capillaries - As increased body size and physiological abilities evolved in vertebrate animals, so did their need for more efficient gas exchange - The right and left side s of the heart rest and receive blood at the same time; then they pump the blood into arteries at the same time - Blood flow and blood pressure depend on the diameter of the arterial vessels and the amount of blood pumped by the heart - The diffusion rate increases when surface area or concentration gradient increases. Aquatic vertebrates use gills for respiration, while terrestrial vertebrates use lungs - The rib cage and lung volumes are expanded during inspiration by the contraction of the diaphragm and other muscles - Hemoglobin loads with oxygen in the lungs and unloads its oxygen in the tissue capillaries. Carbon dioxide is converted into carbonic acid in erythrocytes and is transported as bicarbonate Circulatory systems are the transportation highways of the animal body - Smaller organisms (protists, cnidarians) get oxygen directly - In an open circulatory system (mollusks, arthropods) there is no distinction between the circulating fluid (blood) and the extracellular tissues (interstitial fluid or lymph) - In a
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This note was uploaded on 04/02/2008 for the course BIOL 1106 taught by Professor Georgesimmons during the Spring '08 term at Virginia Tech.

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Bio Exam Two Notes - Bio Exam Two Notes Chapter 44 KEY...

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