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324068
Capillaries
Descrição
alevel Biology (Lifestyle, health and risk) Mapa Mental sobre Capillaries, criado por giorgi.rebecca em 03-11-2013.
Sem etiquetas
biology
lifestyle
health and risk
biology
lifestyle, health and risk
alevel
Mapa Mental por
giorgi.rebecca
, atualizado more than 1 year ago
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Criado por
giorgi.rebecca
mais de 10 anos atrás
199
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Resumo de Recurso
Capillaries
Arterioles feed into networks of capillaries
The capillaries link the arterioles to the venules
BLOOD ENTERING THE CAPILLARIES IS OXYGENATED
BLOOD LEAVING CARRIES LESS OXYGEN AND MORE CARBON DIOXIDE
Capillaries are very small vessels that spread throughout the tissues of the body
They branch between cells, no cell is far away from a capillary
Substances can diffuse between cells and the blood quickly
Because the diameter of the capillaries is small blood travels slowly allowing more time for diffusion
STRUCTURE
Thin walls with no elastic fibers or muscle
Helps them fit between cells
Walls consist one one thin cell
Diffusion occurs at a faster rate
Oxygen and other molecules can quickly diffuse out
Carbon dioxide and waste molecules can quickly diffuse in
Anexos de mídia
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