BIOL 1202 Chapter : Circulation And Gas Exchange Continued
Document Summary
Concept 42. 1: circulatory systems link exchange surfaces with cells throughout the body: transport systems functionally connect the organs of exchange with the body cells. Gastrovascular cavities: simple animals like cnidarians have a body wall only 2 cell layers thick between external environment and gastrovascular cavity, gastrovascular cavity functions both in digestion and circulation, figure 42. 2. Circulatory system parts: both of these types of systems have three basic components, a circulatory fluid, blood, a set of tubes, blood vessels, a muscular pump, the heart. An open circulatory systems_____: does not have blood vessels, allows blood and interstitial fluid to mix with each other**, does not have a heart to pump the blood, consists of a gastrovascular cavity. Concept 42. 2: coordinated cycles of heart contraction drive double circulation in mammals. The cardiac cycle: cardiac cycle, rhythmic contraction and relaxation of the heart, systole, contraction or pumping phase, diastole, relaxation, or filling phase, figure 42. 8, 1.
