Cardio Respiratory System

Question 1

What is the cardio respiratory system?

Answer 1

Inhale 02 through nose+mouth
Down the trachea
In to the lungs
Into the bronchus then bronchioles 
Into the capillaries
Into the alveoli
Gaseous exchange

Question 2

What is gaseous exchange?

Answer 2

02 and CO2 exchange places in the alveoli in the lungs, 02 goes into the blood, CO2 goes back into the air.

Question 3

Explain the process of gaseous exchange?

Answer 3

02 passes through alveoli into red blood cells in the capillaries.

02 combines with haemoglobin to form oxyhemoglobin - carried to muscles.

Haemoglobin carries CO2 to capillaries to be exhaled.

All diffusion.

Question 4

What is a diffusion pathway?

Answer 4

The distance the molecules travel

Question 5

How are alveoli adapted?

Answer 5

1 cell thick - can happen quick, small barrier

Semi Permeable membrane- CO2 can be exhaled quickly and 02 pass through easily

Large surface area-oxygen can get to the capillaries quicker

Question 6

What is diffusion?

Answer 6

The movement of substances from a high concentration to low concentration gradient, to reach equilibrium.

Question 7

What happens to the body during exercise?

Answer 7

Muscles contract
Heart rate increases
Increased blood pressure
Breathing increases

Question 8

What happens when we inhale?

Answer 8

Intercostal muscles CONTRACT
Diaphragm FLATTENS
Chest EXPANDS-lower pressure

Question 9

What happens when we exhale?

Answer 9

Intercostal muscles RELAX
Diaphragm turns to DOME SHAPE
Chest DECREASES-pressure increased