Flashcards
Circulatory System II
Flashcards do conjunto (16)
- 1What are the principle components of circulatory systems?Fluid that circulates through system
Propulsive mechanism
System of tubes/channels
system of one-way valves or septa
Ensure flow away from heart towards metabolising cells
Return from metabolising cells to heart - 2What do these achieve?Bulk Flow
drives fluid flow by applying a force, creating a pressure gradient
Something for fluid to flow through
Ensure flow away from heart towards metabolising cells
Return from metabolising cells to heart - 3What are the pressure and resistance differences between the two systems?Open has a lower pressure system and lower resistance
Closed has a higher pressure system and higher resistance - 4What are the features of an open circulatory system?Incomplete system of vessels
Circulatory fluid is haemolymph - 5Describe the flow of haemolymph through the bodyFlows through vessels and freely percolates through intercellular spaces
Hearts may propel the haemolymph through vessels
Tissues bathed in haemocoel cavity, reaces cells directly
Fluid flows back in through pseudohearts through ostea - 6What does co-ordinated body movements assist in?Haemolymph translocation
- 7Describe open circulation in insectsUse their tracheal systems to transport O2/CO2, haemolymph doesn't carry gases
Circulation can be less efficient when respiratory gases are handled through a separate system - 8What are the features of a closed circulatory system?Complete and continuous system of blood vessels
Fluid in vessels is blood
Heart(s) propel blood through vessels (higher pressure to push through channels)
Blood remains in vessels and separated from cells of the body - 9What role does the lymph system play?Intracellular spaces filled with interstitial fluid, which bathes cells and excess drains into lymph vessels of the lymphatic system
- 10Draw a diagram of the blood vessels involved in circulationGreater arteries
Arterial branches
Arterioles
Capillaries
Venules
Venuous branches
Greater veins - 11Where and how are materials exchanged between blood vessels and cells?Diffusion occurs between blood vessels and interstitial fluid at the capillary bed
Active transport of minerals and ions into capillary beds may also occur - 12Describe the movement of materials from blood vessels to cells and back to the heratSo diffusion occurs over capillary wall into the interstitial space, and then diffuses/is AT from interstitial space into cells
Capillaries then coalesce into venules, which come together to form venuous branches then reach the great vein to empty into the heart - 13How may a closed circulatory system vary between organisms?Anatomy of the heart
Circulation pattern (double/single)
May have accessory hearts that assist venous return
i.e. bony fish have 4 chambered heart in a row that create an accumulative pressure - 14What are the requirements of an efficient circulatory system?efficient O2 carries in blood/haemolymph e.g. respiratory pigment
Efficient gas exchange in the respiratory system at the respiratory interface
Efficient delivery of nutrients
Diversifiation of oxygenated fluids to systemic organs and deoxygenated fluid to respiratory organs
Fast flow of fluids
Efficient gas exchange in tissues - 15What formula allows us to figure out flow rate?FR=DP/R
R=8nL/pir4 - 16What additional function must mammalian cardiovascular systems also carry out?Thermoregulation
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- O usuário eliminou as informações de disciplina FlashCards sobre Circulatory System II, criado por Usuário eliminado em 21-04-2018.
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- Usuário eliminado · abr 2018
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- 21 abr 2018
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- Criado por J yadonknow · 11 jan 2018
- Copiado por J yadonknow · 21 abr 2018
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