They relax. Except when you forcefully exhale, in which case the contracting abs help push the diaphragm up towards the chest cavity, and squeeze some extra air out of the lungs.
It is actually both.
The muscles of assisted inhalation are the external intercostal muscles, pectoral minor, and scalenes. The main muscle of respiration is the diaphragm.
almost every muscle in your body moves when you breath weird huh
Yes, in that sense muscles can only be voluntary or involuntary as far as I know.
Yes, its like the heart beat it's always beating because of the involuntary muscles When you sleep the involuntary muscles make you breath
We need involuntary muscles because then every day we don't have to think how our heart is working .
between ribs helps you catch your breath and turn the upper half of your body
well if muscles run out of oxygen you might slow down and not breath proppely and you might also die.
The deep muscles of the thorax that promote inhaling are known as the diaphragm muscles. These are the muscles that are activated when a person has good posture and takes a deep breath.
Swimming helps your lungs because to swim faster you hold your breath and by holding your breath often it makes your lungs stronger.
Our heart is a muscle that pumps blood through our body There are muscles in our stomach that help us digest our food. There are muscles in our chest that helps us breath. These muscles are not attached to bones and do not have tendons.
Well i prefer a heart that beats, lungs that breath, and a couple of muscles here and there