0
During inhalation the diaphragm muscle contracts and this causes it to (effectively) move downwards, its previously upwardly curving shape becomes a flatter one, and this decreases the pressure in the thorax region (the region in which the lungs reside) because there is more air space. As a consequence, air rushes in from outside the body, via the nose and mouth, and fills the lungs with air. The alveoli in the lungs takes the air and sends it round the blood-stream.
Exhaling is, obviously, the opposite: The diaphragm relaxes, moves upwards to it's original, relaxed state, and thus increases the air pressure in the thorax area (because there is now less air space), this forces air that was not removed by the alveoli, and air that has returned to the lungs from the blood-stream, back into the atmosphere via the nose and mouth. Also, in and out of your nose ...air goes in and out
The diaphragm provides the main force for breathing.(other muscles are used during exercise, like the scalenes and the intercostals) When the diaphragm contracts it moves down into the abdomen by doing so it increases the volume of the thoracic cavity which in turn creates a negative pressure(compared to atmospheric) on the lungs(it actually creates a negative pressure in the intraplueral space). This negative pressure creates a pressure differential between the lungs and the atmosphere causing air to come into the lungs. During exhalation the diaphragm relaxes and the elastic force of the lung causes the air to be pushed outwards.
When inhale you diaphragm relaxes causing less air pressure and the chest cavity to extend. The air pressure has to be less inside your lungs than outside in the atmosphere for you to inhale. When you exhale your diaphragm contracts and you lungs release the air. The air pressure has to be higher inside of your lungs than outside in the environment for you to be able to exhale. Basically, your diaphragm contracts and relaxes as you breathe. When it contracts it is in higher in the chest cavity. That is when you exhale. When your diaphragm relaxes it is in the lower part of your chest cavity. That is when you inhale.
Add your answer:
Earn +20 pts
Which system contains the diaphragm?
The diaphragm belongs to the Muscular and Respiratory systems.RespiratoryThe diaphragm is part of the respiratory system.The diaphragm is a large, dome-shaped muscle that plays an important role in breathing. Therefore, even though it helps out with breathing, it is a part of the muscular system.
What is the function of the skin in the respiratory system?
The skin does not play a direct role in the respiratory system. The respiratory system primarily consists of the lungs, airways, and diaphragm, which work together to facilitate the exchange of oxygen and carbon dioxide in the body. The skin serves as a protective barrier for the body and is not directly involved in the process of breathing.
Which nerve connects the diaphragm to the brain?
The phrenic nerve connects the diaphragm to the brain. It originates from the cervical nerves in the neck and innervates the diaphragm, playing a crucial role in breathing and respiratory function.
What role does the liver play in the respiratory system?
Nothing
Are the salivary glands included in the respiratory system?
No, salivary glands are not part of the respiratory system. Salivary glands produce saliva, which helps with food digestion in the mouth, but they do not play a direct role in the respiratory process of breathing and gas exchange in the lungs.
What are the 2 large lightweight respiratory systems of the body?
The two large lightweight respiratory systems in the body are the lungs and the diaphragm. The lungs are responsible for breathing in oxygen and exhaling carbon dioxide, while the diaphragm is a muscle that plays a critical role in expanding and contracting the lungs to facilitate breathing.
What is a respiratory substrate?
Respiration is oxidation of foods, a catabolic process in living cells which liberate energy for this purpose of liberation of energy the compond used or oxidised is called respiratory substrate. Carbohydrates are preffered as respiratory substrate but some times protein and fat also play the role of respiratory substrate
Which two systems does the nose play a role in?
Respiratory and Immune Systems
Which two systems does the nose play role in?
Respiratory and Immune Systems
What is the crua of the diaphragm?
The crura of the diaphragm are muscular bands that attach the diaphragm to the vertebral column. There are two crura: the right crus which is longer and the left crus which is shorter. They play a crucial role in supporting and stabilizing the diaphragm during respiration.
What role do the rib muscles and diaphragm play in breathing?
Both aid in the expansion and relaxation of lungs.
What is a dome shaped muscle that lies beneath the lungs?
The dome-shaped muscle beneath the lungs is called the diaphragm. It plays a crucial role in the breathing process by contracting and relaxing to help with inhalation and exhalation.
