Why does air move in or out of your respiratory system?

Why does air move in or out of your respiratory system?

As we exhale, the diaphragm moves upward and the chest wall muscles relax, causing the chest cavity to contract. Air pressure in the lungs rises, so air flows from the lungs and up and out of respiratory system through the nose or mouth.

What causes air to move into or out of the lungs quizlet?

When Alveolar volume increases, causing pleural pressure to decrease below atmospheric pressure, air moves into lungs. When alveolar volume decreases, causing pleural pressure to increase above atmospheric pressure, air moves out of the lungs.

How does air move through the respiratory system?

Air enters the respiratory system through the nose and mouth and passes down the throat (pharynx) and through the voice box, or larynx. The entrance to the larynx is covered by a small flap of tissue (epiglottis) that automatically closes during swallowing, thus preventing food or drink from entering the airways.

How does air move out of the lungs during exhalation quizlet?

During exhalation, the pressure in the lungs is greater than the atmospheric pressure (lung volume decrease and pressure increases); thus, air moves out of the lungs. As a result, thoracic volume is decreased and the thoracic pressure is increased, which forces the air out of the lungs.

How does air enter and exit the body?

Air enters your body through your nose or mouth. Air then travels down the throat through the larynx and trachea. Air goes into the lungs through tubes called main-stem bronchi.

How does the movement of your diaphragm cause the air to go in and out of the lungs Brainly?

When you breathe in, or inhale, 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.

What does the movement of the diaphragm cause the air to go in and out of the lungs?

Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges. This contraction creates a vacuum, which pulls air into the lungs. Upon exhalation, the diaphragm relaxes and returns to its domelike shape, and air is forced out of the lungs.