Transport Systems in Multicellular Organisms Flashcards

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Why do multicellular organisms need transport systems?

To supply their cells with useful substances like glucose and oxygen, and to remove waste products.

Why can’t multicellular organisms rely on diffusion alone?

Because they are made up of millions of cells, and as the size of the organism increases, the surface area to volume ratio decreases, making diffusion insufficient to meet cell requirements.

What are the characteristics of an effective exchange surface?

A large surface area, a thin membrane for a short diffusion path, an efficient blood supply, and good ventilation.

What components make up the circulatory system in animals?

Fluids that transport substances, a series of tubes for fluid flow, and a pump to create liquid movement.

What is the main function of the circulatory system in animals?

To transport substances from one area of the body to another.

How do transport systems in plants differ from those in animals?

Plants have tubes that allow fluids to flow and transport substances, but unlike in animals, the movement in plants is not driven by a pump.

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