3.1.2 Transport In Animals

Question 1

why is animals need a specialised transport system?
(5)

Answer 1

• Diffusion over long distances cannot meet demands -need lots of O2 + food
• larger animal = smaller SA:V
Diffusion distances increase but amount of SA to absorb/remove substances gets smaller
• hormones /enzymes made needed elsewhere
• food needed to reach every cell for respiration + metabolism
• very active -respiring quickly

Question 2

Does SA:V ratio increase or decrease as an animal grows?

Answer 2

SA:V decreases as animal gets bigger

Question 3

Does demand for glucose increase as activity levels increase?

Answer 3

Yes

Question 4

Define mass flow

Answer 4

a transport system where substances are transported in a mass of fluid

Question 5

Define vascular system

Answer 5

a system of transport vessels in plants or animals

Question 6

Define open circulatory system

Answer 6

a circulatory system with a heart
Blood isn’t enclosed in blood vessels all the time

Question 7

Define closed circulatory system

Answer 7

a circulatory system where blood is enclosed in vessels
does not come into direct contact with the cells of the body

Question 8

Define haemolymph

Answer 8

Blood/transport medium of insects

Question 9

Define single circulatory system

Answer 9

Circulatory system where blood flows through the heart once for each complete circuit of the body

Question 10

Define double circulatory system

Answer 10

Circulatory system where the blood passes through the heart twice for each complete circuit of the body

Question 11

Define pulmonary circulation

Answer 11

Cardiovascular system -
carries DEOXYGENATED blood to to the lungs
Returns OXYGENATED BLOOD back to the heart

Question 12

Define systemic circulation

Answer 12

Cardiovascular system-
Carries OXYGENATED blood from heart to the body
returns DEOXYGENATED blood back to the heart