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12 Cards in this Set

  • Front
  • Back
what are the components of a true circulatory system in animals?
muscular pump = heart
fluid=blood
conduits=blood vessels
how do plants circulate without a heart
capillary action
which animals dont have a "true" circulatory system
sponges, jellyfish, flatworms
describe an open circulatory system
heart pumps to move internal fluids around body cavity more rapidly; open ended vessels
describe a close circulatory system
blood contained in closed tubes, recirculated
extracellular fluid consists of blood plasma and interstitial fluid; describe these
plasma: fluid portion of circulatory system
interstitial: fluid that bathes and surrounds cells
what is fluid of open circ. sys
extracellular fluid
advantages of closed circ sys
-blood can be directed to specific tissues
-blood volumes reduced
-leaning of blood by kidneys
-faster transport
-arteries
-venules
-capillaries
-branch into arterioles that feed capillary beds
-drain capillary beds and form veins
-sites of gas/nutrient exchange
what is blood pressure?
force exerted by blood against the walls of vessel
how does fish circ sys work
-how many heart chambers
heart - gills - body - heart
-two chambered heart
- blood pumped to body under low pressure
how BP compared between systemic and pulmonary circuit in 4 chambered heart
pulmonary = low
systemic = high