Exchange Surfaces Flashcards

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What is an exchange surface in a living organism?

It is a special area where substances move in or out of the body or cells.

Most of their cells are far from the outside. They need exchange surfaces to take in and remove substances quickly.

Oxygen and digested food molecules, such as glucose, are taken in at exchange surfaces.

Carbon dioxide and urea leave the body through exchange surfaces.

The alveoli in the lungs are the main exchange surface for oxygen and carbon dioxide.

The inner surface of the small intestine, which has many villi, is the exchange surface for digested food.

The surface of the leaf, where stomata are found, acts as an exchange surface for gases.

Root hair cells form an exchange surface that takes in water and mineral ions from the soil.

Their whole body surface touches the environment, so substances can diffuse in and out easily.

They usually move by diffusion, from a high concentration to a low concentration.