Flashcards
Circulatory Systems
Flashcards do conjunto (11)
- 1Why do multicellular organisms need a constant, rapid supply of glucose and oxygen?Multicellular organisms have a low SA:V ratio and a higher metabolic rate; many are very active
This means a large number of cells are respiring very quickly
CO₂ also needs to be removed from cells quickly - 2What are the different types of circulatory systems?Single
Double
Closed
Open - 3What is a single circulatory system?Blood only passes through the heart once for each complete circuit of the body
- 4Give an example of an organism with a single circulatory systemFish - the heart pumps blood to the gills (to pick up oxygen) and then to the rest of the body
- 5What is a double circulatory system?Blood passes through the heart twice
- 6Give an example of an organism with a double circulatory systemMammals - right side pumps to the lungs, the left side pumps to the rest of the body. This makes the blood travel faster, so O₂ is delivered to tissues more quickly
- 7What is a closed circulatory system?The heart pumps blood into arteries which branch out into capillaries where O₂ and C₆H₁₂O₆ diffuse into body cells
- 8TRUE OR FALSE: All vertebrates have a closed circulatory system where blood is enclosed inside blood vesselsTRUE
- 9What is an open circulatory system?Blood is not enclosed in blood vessels all the time; it flows freely through the body cavity. It does NOT supply the cells with O₂ - this is done by the tracheal system
- 10TRUE OR FALSE: All invertebrates have an open circulatory systemFALSE
Only some do (e.g. insects) - 11Complete the sentence: An insect's heart is ___________; it contracts in a ________, pumping blood into the main artery (which opens up into the ______ ________)An insect's heart is SEGMENTED; it contracts in a WAVE, pumping blood into the main artery (which opens up into the BODY CAVITY)
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- O usuário eliminou as informações de disciplina FlashCards sobre Circulatory Systems, criado por Usuário eliminado em 05-03-2018.
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- Criado por Yinka F · 31 jan 2018
- Copiado por Yinka F · 5 mar 2018
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