Circulatory System - Biology 20B April 9, 2009...

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Biology 20B April 9, 2009 Cardiovascular System 1. different circulatory systems 2. what blood transports 3. circulatory system 4. comparative systems 5. effects of exercise on the heart What blood transports: -O 2 and CO 2 (cellular respiration) -H 2 O and nutrients -waste products to kidneys and liver -hormone to target cells -white blood cells- immune response -heart transfer to extremities (constriction/dilation of blood supply) Oxygen Transport: -low concentration of dissolved O 2 in the serum, doesn’t suffice for metabolic needs of cells -respiratory pigments raise O 2 levels in blood - may be within red blood cells or in plasma -proteins w/ metal ions (usually copper or iron) Hemoglobin: -O 2 carrier -found in RBCs -4 subunit quandary structure - each subunit has a Fe ion - O 2 binds reversibly to iron core -each hemoglobin can bind to 4 O 2 molecules - RBCs from bone marrow Comparative Circulatory System: 3 main types 1. gastrovascular 2. open system 3. closed system Gastrovascular system: -body cavity with a single opening to outside
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This note was uploaded on 09/15/2009 for the course BIOE 20B taught by Professor Williams during the Spring '09 term at University of California, Santa Cruz.

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Circulatory System - Biology 20B April 9, 2009...

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