Give the condition of the following muscles during expiration

cbse
breathing

#1

Give the condition of the following muscles during expiration.
(i) Diaphragm muscles (ii) Internal intercostal muscles


#2

(i) The muscles of the diaphragm are in a relaxed position, making it convex.
(ii) The internal intercostal muscles are contracting thus, pulling the ribs downward and inward.