Respiration is a process which involves taking in of oxygen through inhalation to supply to the tissues and release of carbon di oxide through exhalation from tissues to the atmosphere. During inhalation the rib cabe expands by moving out. The diaphragm moves down. These two process occur simultaneously to increase the air holding capacity of the lungs by expanding the alveolar cells of lungs.
During inhalation, the ribs move outward as the diaphragm contracts and the chest cavity expands to allow the lungs to fill with air. During exhalation, the ribs move inward as the diaphragm relaxes and the chest cavity decreases in size, forcing air out of the lungs.
The diaphragm, a sheet of muscles spanning the rib cage just below the lungs, is mainly responsible for both inspiration and expiration. The intercostal muscles are also used, expanding and contracting the the space between the ribs. The abdominal muscles are used to a lesser extent either by relaxing to allow further expansion of the diaphragm or contraction for rapid expulsion of air. (Note to the person who answered this question previously: "Inspiration" means to inhale. "Expiration means to exhale. Don't tell someone that they don't know what they are talking about unless you know what you are talking about.)
Ribs: The ribs protect the lungs and expand as you inhale to facilitate space for the lungs to expand like the diaphragm. The ribs then contract expelling the air in the lungs. The ribs enclose the thoracic cavity providing bony protection for the vital organs of the thorax's heart and lungs.
Ribs move with the diaphragm to assist in breathing. While they are fairly rigid, just look at how your chest expands and contracts while breathing. If they were immovable, there would be no movement.
The diaphragm has peripheral attachments to structures making up the abdominal and chest walls. These attachments have muscle fibers that converge in the central tendon, forming the crest of the dome.
Your diaphragm lowers and your ribs expand outwards
During inspiration the ribs move upwards and outwards and the diaphragm contracts ,thus,increasing the volume of the thoracic cavity.this leads to a decrease in pressure inside the lung.therefore the air from outside rushes in . During expiration the ribs move inwards and downwards and the diaphragm relaxes thus,creating low pressure .this leads to the expulsion of air from our body.
The ribs rise up during inhalation when the diaphragm contracts and moves downward, creating more space in the chest cavity. This causes the ribs to move up and outwards. During exhalation, the diaphragm relaxes and moves back up, while the ribs move downward and inwards to decrease the space in the chest cavity.
The diaphragm (a sheet of muscle underneath the ribcage) and intercostal muscles (located between your ribs).
The diaphragm attaches to the bottom six ribs, ribs 7-12.
It contracts and relaxes to help pull air into the lungs and push it back out. The diaphragm contracts and moves lower which expands the ribs and allows air to move into the lungs. When it relaxes, the ribs contract and push air back out of the lungs.
The intercostal muscles. Intercostal means "between ribs".
Ribs are for protection i think and diaphragm is the muscle controlling inhaling and exhaling. Also: the rib muscles can help the breathing process, which is useful when the diaphragm is weak, constricted, or to get an extra-big breath. Breathing from the diaphragm makes the belly move in and out as the lungs extend downwards. Breathing from the rib muscles makes the chest expand and rise.
Actually, no. The rectus abdominis is a muscle that helps with the digestion of food, helps to hold organs in one place and gives you the "6 pack" feature when doing sit ups. There are two other muscles on the ribs that help the lungs with inspiration. They are the Intercostalis muscles. One is on the ribs themselves and one is on the gaps between the ribs. They move the ribs in and out with the lungs with every inspiration and expiration. Hope this helps!
In addition to the diaphragm, several muscles assist in inspiration, including the intercostal muscles, scalene muscles, and sternocleidomastoid. The intercostal muscles elevate the ribs and expand the thoracic cavity, while the scalene muscles lift the first two ribs, further increasing lung volume. The sternocleidomastoid helps raise the sternum, enhancing overall chest expansion. Together, these muscles work to create a negative pressure in the thoracic cavity, allowing air to flow into the lungs.
Diaphragm
During inhalation (inspiration) the ribs move up and out. Volume in the thorax increases whilst pressure decreases. The diaphragm goes down and the intercostal muscles contract. Just to let you know, exhaling (expiration) is just the opposite to inspiration. :) - Hope I helped :)