BIOL 1202 Study Guide - Final Guide: Gastrovascular Cavity, Extracellular Fluid, Pulmonary Vein
Document Summary
42. 1: circulatory systems link exchange surfaces with cell 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 one 2 cell layers thick between external environment and gastrovascular cavity, gastrovascular cavity functions both in digestion and circulation. More complex animals have 2 types of circulatory systems: open circulatory system: blood bathes the organs directly, eg. Arthropods, and most molluscs: allows blood and interstitial fluid to mix with each other, closed circulatory system: blood is confined to vessels and is distinct from the interstitial fluid, some invertebrates and all vertebrates. 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 (heart, vertebrate circulatory system (figure 42. 4 &5) Concept 42. 2: coordinated cycles of heart contraction drive double circulation in mammals: the mammalian cardiovascular system (figure 42. 6)
