The Heart and Blood Vessels (The Need For A Circulatory System) Flashcards Preview

Biology: The Heart + Human Nutrition + Cell Structure > The Heart and Blood Vessels (The Need For A Circulatory System) > Flashcards

Flashcards in The Heart and Blood Vessels (The Need For A Circulatory System) Deck (5)
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1
Q

What is an example of a small organism that does not need a circulatory system?

A

Amoeba

2
Q

What type of system do small organisms such as Amoeba not need?

A

Circulatory systems

3
Q

Why do amoeba not need a circulatory system?

A

As nutrients and oxygen are supplied to their cells and wastes are removed by diffusion

4
Q

For what type of organisms is diffusion adequate instead of a circulatory system?

A

Organisms that are only a few cells thick

5
Q

What do larger organisms need a circulatory system to supply their cells with?

A

All the materials they require

Decks in Biology: The Heart + Human Nutrition + Cell Structure Class (42):