Breathing. Kidding aside, the breathing centre in the brain is constantly receiving signals from the body about the amount of oxygen that is needed. This will depend on how active you are. When you are asleep you will need far less oxygen than when you are running. When you are asleep you will breathe more slowly, and when you are running, you will breathe more rapidly. Once the brain knows how much oxygen is needed, it sends messages along nerves to the breathing muscles so that the right amount of air is breathed into the lungs.
The thoracic diaphragm.
nose
diaphragm
Diaphram
Diapharagram is a muscle beneath the lungs. It helps in brething. When it pulls, we take air in. When it pushes, we exhale air out.
The diaphragm, a muscle right at the bottom of you rib cage, pulls air into your lungs and pushes it back out.
They are separated by the DIAPHRAGM - the thin, elastic muscle sheet that pulls downwards so that your lungs will pull air inwards.
pushes and pulls are things you do when energy is applied
The diaphragm is a strong wall of muscle on the bottom of the chest cavity. As this wall of muscle expands downward, a vacuum is created which pulls air into the lungs. As the diaphragm returns to it's original position, air is pushed out of the lungs.
pushes
us
When the diaphragm contracts, it pulls down and creates a vacuum in the lungs, which helps in breathing in.
Lungs, bronchial tubes, nosenasal cavitynostrilstrachealungsdiapraghmpharynxlarynxalvoeli/air sacsbronchiolesepiglottis
gravity Du
Pushes and pulls in a particular direction are referred to as forces. These are measured in Newtons, after the famous scientist Sir Isaac newton.