Question

1. The muscle which helps in breathing.​

Answer 1

Answer:

diaphragm

is the only muscle helpful in breathing

Answer 2

Answer:

the diaphragm

Explanation:

it is not the only muscle

there are three groups of respiratory muscles: the diaphragm, the rib cage muscles and the abdominal muscles. Each group acts on the chest wall and its compartments, i.e. the lung-apposed rib cage