Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
3 Cards in this Set
- Front
- Back
|
Why do many animals and humans have a heart and circulatory system |
Cannot rely on diffusion as we have a small surface area to volume ratio |
|
|
What is the mass transport system used for |
To carry raw materials from specialised exchange organs to body cells and remove metabolic waste |
|
|
Function of circulatory system |
Blood is used to transport substances such as nutrients and oxygen to cells |
