Q:

What are the steps involved in inhalation and exhalation?

A:

Quick Answer

Breathing is a complex process that happens several times within just a minute. Although involuntary, breathing is vital for a person to live. Inhaling and exhaling is essentially changing the air pressure inside the body to take in and remove air.

Continue Reading

Full Answer

  1. Breathe in

    When a person inhales, the diaphragm and the muscles between the ribs contract and expand the chest cavity. When the chest cavity expands, the pressure in the chest is lowered to a level below that of the air pressure outside. When this happens, air flows in through the airways from a high pressure to low pressure and inflates the lungs.

  2. Breathe out

    When a person exhales, the diaphragm and muscles between the ribs relax and make the chest cavity smaller. The decrease in the volume of the chest cavity increases the pressure to a level that is higher than the air pressure outside. The air from the lungs then flows out of the airways to the outside air.

  3. Take another breath

    The cycle of changing the air pressure in a person's body repeats with each breath he takes. Breathing is essential for life, and the air that is breathed in regulates several processes within a person's body.

Learn more about Organs

Related Questions

  • Q:

    What role do the lungs have in the excretory system?

    A:

    According to the New Health Guide Organization, the role the lungs play in the excretory system is to dispose of carbon dioxide through exhalation. This occurs when cells release carbon dioxide into the bloodstream. The blood then travels to the lungs where the carbon dioxide is transferred to the lungs.

    Full Answer >
    Filed Under:
  • Q:

    Can pleurisy start with back pain?

    A:

    Commonly, pleurisy first presents itself with a sharp pain during inhalation or exhalation, states Healthline. However, back pain is a symptom of pleurisy and could be present in patients with the condition.

    Full Answer >
    Filed Under:
  • Q:

    What happens when we inhale and exhale?

    A:

    The process of breathing performs a number of important gas exchanges through inhalation and exhalation. When someone inhales, they contract and move their diaphragm, which allows the lungs to expand. This is a part of the process needed to psychically suck in the air. When a person exhales, the diaphragm relaxes and the movement is undone. This allows air to be gradually pushed out of the lungs.

    Full Answer >
    Filed Under:
  • Q:

    What are the mechanics of breathing?

    A:

    The mechanics of breathing involve the inhalation and exhalation of air into the lungs through the movement of the diaphragm muscle, according to MedlinePlus. The diaphragm contracts to expand the lungs, which draws air into them during inhalation. Then the diaphragm relaxes to reduce the size of the lungs, which forces air out of them during exhalation.

    Full Answer >
    Filed Under:

Explore