After the trachea, air travels through the...

• Bronchiole
• Alveoli
• Bronchus
• Capillary

Identify the pathway of air.

• nasal cavity, throat, bronchioles, bronchi, alveoli
• mouth, nasal cavity, bronchi, bronchioles, alveoli
• nasal cavity/mouth, trachea, bronchi, bronchus, alveoli
• nasal cavity/mouth, trachea, bronchi, bronchioles, alveoli

A capillary is a form of...

• Gas exchange

• Respiration

• Blood vessel

• Alveoli

Identify a characteristic of capillaries

• Thick cell wall

• Small lumen

• Contain valves to prevent backflow

• Semi permeable membrane

Gaseous exchange happens...

• in the bronchi
• in the lungs
• in the alveoli
• in the heart

Gaseous exchange is when...

• o2 diffuses from the alveoli to the capillary
• co2 diffuses from the alveoli to the capillary
• o2 diffuses from the capillary to the alveoli
• co2 diffuses from the capillary to the alveoli

Oxygen + haemoglobin = ?

• oxygenated haemoglobin
• oxyhaemoglobin
• haemoglobin
• oxygenglobin

Gaseous exchange happens because of...

• Osmosis

• Respiration

• Diffusion

• Semi-permeable membranes

Diffusion is...

• Movement of gas from an area of high concentration to high

• Movement of gas from an area of high concentration to low

• Movement of gas from an area of low concentration to high

• Movement of gas from an area of low concentration to low

Air arriving in the alveoli has a...

• Higher concentration of carbon dioxide (CO2) and a lower concentration of oxygen (O2)

• Higher concentration of oxygen (O2) and a lower concentration of carbon dioxide (CO2)