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Unformatted text preview: few degrees or pHs we will die. Open vs. Closed Circulatory system: Circulating fluid, interconnecting tubes, pump (heart) Open System: easy to maintain, but not a demanding system. Closed system: Huge strain, but can live as a ectodermic. Fish, rays, sharks have this single circulation system with one ventricle and one atrium. MEMORIZE THE CHAMBERS IN THE HEART Higher animals have evolved more complex circulatory system. Veins and atriums are distinguished by direction and not oxygenation. Note distinct pulmonary and systemic circuits. The Human Heart Beats 72 times per minute...
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This note was uploaded on 02/28/2012 for the course BIO 220 taught by Professor Morre during the Spring '09 term at USC.
- Spring '09