Select the muscles that contract during inspiration.Multiple select question.Abdominal wall musclesExternal intercostalsInternal intercostalsDiaphragm

When selecting the muscles that contract during inspiration, we need to consider the primary muscles involved in the process of inhalation.

Muscles That Contract During Inspiration

1. Diaphragm: This is the primary muscle responsible for inspiration. When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity and allowing air to fill the lungs.

2. External intercostals: These muscles assist during inspiration by elevating the ribs and expanding the chest cavity.

Muscles that do NOT predominantly contract during inspiration:

3. Internal intercostals: These muscles are primarily involved in expiration (exhalation) and do not play a significant role in inspiration.

4. Abdominal wall muscles: These are generally not active during normal inspiration; instead, they are involved in forced expiration or other activities such as heavy breathing.

Final Answer

The muscles that contract during inspiration are:

• Diaphragm
• External intercostals