1.1.1 Purpose of the heart Flashcards
1
Q
What is the primary purpose of the heart?
A
To move substances around the body
2
Q
How do very small organisms move substances around their cells?
A
They transport substances using diffusion. This is usually unicellular organisms.
3
Q
Define diffusion
A
Diffusion is the net movement of particles from an area of high concentration to low concentration
4
Q
What do most animals use to transport substances?
A
They use blood to carry around substances
