Question

what happens when we breathe in ?​

Answer 1

Answer:

When you breathe in, or inhale, your diaphragm contracts and moves downward. This increases the space in your chest cavity, and your lungs expand into it. The muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.

Explanation:

Answer 2

As you take a breath, or inhale, your diaphragm contracts and slips lower. The increased room in your chest cavity allows your lungs to expand. The muscles that run between your ribs also help to expand your chest cavity. They contract when you inhale, forcing your rib cage up and outward.

• The trachea, chest wall and diaphragm muscles, and blood vessels.
• Your respiratory system is made up of tissues that allow you to breathe and exchange gas.
• Your brain regulates your breathing rate by detecting your body's need for oxygen and its desire to eliminate carbon dioxide (how quickly or slowly you breathe).