What happens during exhalation of air from the lungs?

What happens during exhalation of air from the lungs?

When you breathe out, or exhale, your diaphragm and rib muscles relax, reducing the space in the chest cavity. As the chest cavity gets smaller, your lungs deflate, similar to releasing of air from a balloon.

How does air move into the lungs during exhalation quizlet?

When you inhale, the diaphragm moves downward and pressure in the lungs decreases, causing air to flow in. When you exhale, the diaphragm moves upward and the pressure in the lungs increases, pushing the air out.

What is the pathway of air upon exhalation?

In order for the lungs to expel air the diaphragm relaxes, which pushes up on the lungs. The air then flows through the trachea then through the larynx and pharynx to the nasal cavity and oral cavity where it is expelled out of the body.

When does air moves out of the lungs quizlet?

Air moves out of the lungs when the pressure inside the lungs is greater than the pressure in the atmosphere. The pressure of a gas in a closed container is inversely proportional to the volume of the container. If the size of a closed container increases, the pressure inside the container decreases.

What happens during exhalation and inhalation?

During inhalation, the lungs expand with air and oxygen diffuses across the lung’s surface, entering the bloodstream. During exhalation, the lungs expel air and lung volume decreases.

What are the four steps of exhalation?

Inhaling and exhaling may seem like simple actions, but they are just part of the complex process of respiration, which includes these four steps:

• Ventilation.
• Pulmonary gas exchange.
• Gas transport.
• Peripheral gas exchange.

What is the process of air moving in and out of the lungs called quizlet?

Ventilation is the movement of air into and out of the lungs because air moves from an area of HIGH pressure to an area of LOW pressure.

How does air move through the respiratory system?

Ventilation, or breathing, is the movement of air through the conducting passages between the atmosphere and the lungs. The air moves through the passages because of pressure gradients that are produced by contraction of the diaphragm and thoracic muscles. Pulmonary ventilation is commonly referred to as breathing.

What causes air to flow in and out of the lungs?

It is the active phase of ventilation because it is the result of muscle contraction. During inspiration, the diaphragm contracts and the thoracic cavity increases in volume. This decreases the intraalveolar pressure so that air flows into the lungs.

What happens to the muscles around the lungs when you exhale?

Muscles in your chest and abdomen contract (tighten) to create a slight vacuum around your lungs. This causes air to flow in. When you exhale, the muscles relax and the lungs deflate on their own, much like an elastic balloon will deflate if left open to the air. Diaphragm, which is a dome-shaped muscle below your lungs.

How much air can a person move into and out of their lungs?

Vital capacity (VC) is the amount of air a person can move into or out of his or her lungs, and is the sum of all of the volumes except residual volume (TV, ERV, and IRV), which is between 4000 and 5000 milliliters.