Exchange and Transport, Circulatory System

Question 1

In Relations to suface area to volume ratio, smaller the organism…

Answer 1

Smaller the organism, higher the surface area to volume ratio. Nutrients diffuse directly into the organism quickly to sustain life

Question 2

How can multicellular organism increase their surface area:volume ratio

Answer 2

1. Lungs contain many alveoli
2. Small intestine contain villi

Question 3

What is the Circulatory System?

Answer 3

Made up of heart and blood vessels.

Question 4

What type of Circulatory System is Humans

Answer 4

double dicrulatory system.

Question 5

What is double circulatory system?

Answer 5

Heart pumps deoxygenated blood and oxygenated blood.

Question 6

List 3 types of Blood vessles in Humans.

Answer 6

1. Arteries
2. Veins
3. Capillaries

Question 7

Function of Arteries

Answer 7

Carry blood away from heart under high pressure!

Question 8

Function of Veins

Answer 8

Returns blood to heart

Question 9

What are Valves

Answer 9

Valves (found in veins) to stop blood following from wrong way

Question 10

Function of Capillaries

Answer 10

Every cell close to a capillaries. Substances easily move through a semi permeable walls