0
What two parts help expand and contract the chest cavity while breathing?
Wiki User
∙ 12y ago
The lungs and diaphragm.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Which is the major muscle for breathing?
The Diaphragm.When the diaphragm contracts, it increases the size of the thoracic cavity (chest), which lowers the air pressure, causing outside air to flow in.The external intercoastals are also used in breathing. They are the muscles on your ribs, that pull on your rib cage and help to expand the chest cavity.
What causes the diaphragm to contract?
enlarge
What does the rib muscles and diaphragm contract do to the chest cavity?
The space in your chest cavity increases.
What muscle contracts to expand the chest cavity?
The Diaphragm
What happens to the chest cavity when your breathing?
Under normal inspiration the chest wall stays relatively still, only the abdomen moves because of diaphragmatic motion. However, when you take a deep breath the intercostal muscles and the scalene muscles contract. This causes the chest wall to expand outward(due to the intercostals) and move upwards(due to the scalenes).
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
The intercostals are located?
The intercostal muscles are located between the ribs. They play important roles in breathing. There are two sets of intercostal muscles, external and internal. The external intercostals contract during normal inspiration, causing the rib cage to expand out and up and thus increase the volume of the chest cavity. The internal intercostals are used during forced expiration only. When they contract, the rib cage pulled down and together, shrinking the volume of the chest cavity.
What happens to the lungs when the chest cavity becomes bigger?
The lungs expand.
What roles do the diaphragm and intercostal muscles play in breathing?
because it divides the chest from the abdomen
What is the pleura space?
The potential space between the lining of the chest cavity (pleura) and the lining that covers the lungs (also called the pleura). These linings are made of serous membranes that secrete serous fluid for lubrication, so there is no friction during breathing when the lungs expand and contract against the chest wall. There is a vacuum maintained in this space that keeps the lungs inflated.
What bones protect your lungs heart?
Ribs, spine, and breastbone (sternum) make up the ribcage (or thoracic cage) - a cage of bone that surrounds the thoracic cavity (the space in your chest where the heart and lungs are). These bones are durable and flexible, deformable enough to allow the chest to expand and contract while breathing, but tough enough to protect the heart and lungs against trauma or crushing.
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.
