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circulatory_system

highschool biology 2 study guide

QuestionAnswer
unicellular protists with a high surface area to volume ratio rely on __________ for gas, nutrients, and waste exchanges with the external environment that surrounds them Diffusion
Larger invertebrates usually have a _______ system. circulatory
Some of these have a(n) _______ and others have a _____ circulatory system. Open closed
what two types of organisms have a sac body plan which makes a circulatory system unnecessary because each cell is exposed to water and can exchange gases and rid itself of wastes. sea anemones (cnidarians flatworms (planarians)
most animals have a circulatory system which a pumping ____ moves a fluid into ____, which is always contained within blood vessels, and ___ which flows into a body cavity called a ____ heart vessels hemolymph hemocoel
hemolymph is a mixture of what two things? blood and interstititial fluid
hemolymph is seen in animals that have an ___ circulatory system. open
in mmost mollusks and arthropods, the heart pumps hemolymph via vessels into ___ that are sometimes enlarged into saclike sinuses. Hemolymph then drains back into the heart tissue
in the grasshopper, the heart contracts and openings called ____ are closed ostia
When the heart _____, the hemolymph is sucked back into the heart by way of the ostia. relaxes
Hemolymph is colorless in grasshoppers because there is no ___. hemoglobin
Some invertebrates like earthworms (annelyds), squid and octopi (mollusks) have a ___circulatory system. closed
____, cells and plasma, is pumped by the ___ into the system of blood ___. blood heart vessels
Created by: watts98611
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