GradeGen

A tiny blood vessel with a thin wall through which substances can be exchanged between blood and surrounding tissues.

A very small blood vessel where substances are exchanged between blood and surrounding tissues.

A network of capillaries surrounds the alveoli, bringing blood close to the air inside them.

Each alveolus is surrounded by tiny blood vessels called capillaries. Gas exchange occurs across the alveolar wall and the capillary wall.

A tiny blood vessel with a wall one cell thick, adapted for exchanging substances between blood and tissues.

Link each adaptation to its effect: for example, a capillary wall is one cell thick, giving a short diffusion distance and allowing rapid exchange.

A tiny blood vessel with a thin wall through which substances can be exchanged between blood and surrounding tissues.

A very small blood vessel where substances are exchanged between blood and surrounding tissues.

A network of capillaries surrounds the alveoli, bringing blood close to the air inside them.

Each alveolus is surrounded by tiny blood vessels called capillaries. Gas exchange occurs across the alveolar wall and the capillary wall.

A tiny blood vessel with a wall one cell thick, adapted for exchanging substances between blood and tissues.

Link each adaptation to its effect: for example, a capillary wall is one cell thick, giving a short diffusion distance and allowing rapid exchange.

Capillary