inspiration and expiration🔃

Question 1

inspiration

Answer 1

• ribs move up and in
• the diaphragm flattens
• the volume of the thorax increases and the pressure decreases
• the lungs expand
• the pressure in the lungs is lower then the outside air so air is sucked in through the trachea

Question 2

expiration

Answer 2

• the ribs move down and in
• the diaphragm bows upwards
• the volume of the thorax decreases and the pressure increases
• he lungs recoil back to their original shape
• the pressure in the lungs is higher than the outside and do the air moves out through the trachea