The challenges of size in animals - OCR Gateway

1

Why do multicellular organisms need a transport system?

2

Which path describes the movement of oxygenated blood?

3

Which of these statements is true of pulmonary circulation?

4

Which type of blood cell does not have a nucleus?

5

Which type of blood cell produces antibodies?

6

What are the tiny projections of the intestines called?

7

Which of these is not an adaptation of villi?

8

What is the name of the substance that makes up 55% of blood?

9

What are platelets?

10

What is the function of valves in the veins?