Transport In Animals

Question 1

What is a Circulatory system?

Answer 1

System of tubes with a heart and valves to ensure one-way flow of blood

Question 2

Structure of of Single Circulation system.

Answer 2

2 heart chambers
Blood absorbs oxygen in gills
Released in body cells then back to heart

Question 3

Structure of Double Circulation system.

Answer 3

4 heart chambers
Blood passes through heart twice
Oxygenated in lungs, to heart, to body and back to heart

Question 4

Advantage of Double Circulation system.

Answer 4

Delivers greater blood flow rate to tissues around the body

Question 5

Function of Right Atrium

Answer 5

Collects deoxygenated blood and pumps to right ventricle

Question 6

Function of Right Ventricle

Answer 6

Pumps de-oxygenated blood to lungs

Question 7

Function of Pulmonary Artery

Answer 7

Carries de-oxygenated blood to lungs from right ventricle

Question 8

Function of Septum.

Answer 8

Separates right and left parts of the heart.

Question 9

Function of Pulmonary Vein.

Answer 9

Carries oxygenated blood from lungs to left atrium

Question 10

Function of Left Atrium

Answer 10

Collects oxygenated blood and pumps it to left ventricle

Question 11

Function of Left Ventricle

Answer 11

Pumps oxygenated blood to body via aorta

Question 12

Function of Aorta

Answer 12

Carries blood from left ventricle to the rest of the body

Question 13

Function of Tricuspid and Bicuspid valves.

Answer 13

Prevents backflow of blood into the atria when the ventricles contract (atria ventricular valves)

Question 14

Function of Pulmonary and Aortic Valves.

Answer 14

Prevents backflow of blood from arteries into the ventricles (semi-lunar valves)

Question 15

Function of Arteries.

Answer 15

Transport High pressure blood away from the heart

Question 16

Function of Veins

Answer 16

Transport low pressure blood to the heart

Question 17

Function of Capillary

Answer 17

Allow substances to diffuse into the cells

Question 18

Structure of artery

Answer 18

Elastic walls expand and relax as blood is forced out.
Thick walls adapted to withstand pressure
Rings of muscles narrow/widen to control blood flow

Question 19

Structure of vein.

Answer 19

Valves prevent backflow of blood.
Nearby muscles squeeze veins to push blood to the heart.
Large diameter and thin walls to reduce resistance of blood flow

Question 20

Structure of capillary.

Answer 20

One cell thick for easy diffusion.
Highly branched for more surface area.
Beds constantly supplied with fresh blood.

Question 21

Function of red blood cells.

Answer 21

Haemoglobin and oxygen transport

Question 22

Function of White blood cells

Answer 22

phagocytosis and antibody formation

Question 23

Function of platelets

Answer 23

Causing clotting