2.2.2 The Lungs And Breathing

Question 1

Alveoli

Answer 1

Air sacs inside the lungs where gas exchange occurs

Question 2

Breathing

Answer 2

Physical movement of air in and out the lungs

Question 3

Respiration

Answer 3

Chemical breakdown where energy is released from the breakdown of food

Question 4

Gas exchange

Answer 4

The exchange of carbon dioxide and oxygen between the air in the alveoli and the blood

Question 5

Nose

Answer 5

Opening where air from outside can enter and leave the body

Question 6

Trachea

Answer 6

Tube that takes air from the nose towards the lungs

Question 7

Bronchi

Answer 7

Trachea splits I to two tubes and these split into smaller tubes called bronchioles

Question 8

Diaphragm

Answer 8

Muscle involve in breathing/ventilation

Question 9

Intercostal muscles

Answer 9

Muscles between ribs that are involved in breathing

Question 10

Rib

Answer 10

Protect the heart and lungs

Question 11

Heart

Answer 11

Pumps blood around the body

Question 12

Adaptations of alveoli

Answer 12

Good blood supply
Spherical shape
Think walls
Ventilation

Question 13

Ventilation

Answer 13

Helps to maintain steep concentration gradient

Question 14

Spherical shape

Answer 14

Gives a large surface area for diffusion