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Short answer: to let air in.
Medium answer: a big pint glass holds more water than a little tiny shot glass. The pint glass has more room, more volume. Your expanded chest holds more air so air rushes to fill the space.
Longer answer: when you breathe in your intercostal muscles contract pulling your rib cage up and out. At the same time your diaphragm, the muscular sheet at the bottom of your lungs pulls down.
Wiki User
∙ 13y ago
Wiki User
∙ 9y agoThe chest expands when a person exhales. The chest expands because the lungs and the ribcage expands when breath is taken in.
Wiki User
∙ 15y agoYou and your friend are made diffrently. Maybe you are a bit skinnyer than he/she is or maybe you have larger lungs or a thicker rib cage
Wiki User
∙ 13y agoAir is drawn into the lungs by the creation of a negative pressure within the lungs. The chest by expanding pulls in the air similarly to what happens with a bellow.
Wiki User
∙ 7y agoYes it does. When you breathe in - the diaphragm contracts, pulling air into the lungs - which expand, pushing the ribs forward.
Wiki User
∙ 14y agoexpand
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What happens to the size of the chest cavity as you inhale?
The movement of the diaphragm affects the size of the chest cavity by when you inhale the chest cavity enlarges, but when you exhale the chest cavity becomes smaller.
What happens to the volume of your chest cavity when you inhale?
When you inhale the volume increases, because the chest cavity expands to hold your breath.It increases.
What happens to your chest when you inhale?
When you inhale, the chest cavity expands. Seventh grade life science, baby.When you breathe in, your diaphragm contracts (tightens) and moves downward. This increases the space in your chest cavity, into which your lungs expand. The intercostal muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.
What exercises can increase the size of chest muscles?
Lots of push ups can give you finely tuned chest muscles
What muscle or muscles expand the chest cavity by rotating the ribs upward contibuting to inspiration?
What muscle expand the chest cavity by rotating the ribs upward, contributing to inspiration
How do you inhale and exhaile?
When you inhale your rib muscle and diaphram contract and expand the chest cavitie. When you exhale you rib muscle and diaphram relax, reducing the size of the chest cavitie.
Does your chest expand because your lungs inflate or do your lungs inflate because your chest expands?
There are no muscles in the lungs that help inhale or exhale, this is the job of the diaphragm.
Would you die if you were up to your neck in cement?
You would suffocate because you would not be able to expand your chest and inhale.
What happens to lungs when you inhale?
what happens when you inhale is that air goes into your lungs and your lungs get bigger ...Actually, your diaphragm moves to expand the volume of your thoracic cavity, which pulls a partial vacuum on your lungs, causing them to expand FIRST...and THEN the partial vacuum created by your expanded lungs causes air to move into them. When you breath out, it causes the reverse to occur.
What happen to the lung if you are inhale?
it expand
What causes the diaphragm to contract?
enlarge
What happens to the size of the chest cavity as you inhale?
The movement of the diaphragm affects the size of the chest cavity by when you inhale the chest cavity enlarges, but when you exhale the chest cavity becomes smaller.
What happens to the volume of your chest cavity when you inhale?
When you inhale the volume increases, because the chest cavity expands to hold your breath.It increases.
What is the purpose of the Pleura?
This membrane protect the lining of the chest from rubbing against the lungs walls
What is the movement of the chest cavity and the diaphragm?
inhale
Sequence the skeletal and muscular changes that take place when a person inhales?
When you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. This increases the space in your chest cavity, into which your lungs expand. The intercostal muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.
What happens to your lungs when you inhale?
the chest cavity expands.
