ANATOMY

Detailed explanation-1: -Definitions of breathing in. the act of inhaling; the drawing in of air (or other gases) as in breathing. synonyms: aspiration, inhalation, inspiration, intake.

Detailed explanation-2: -The first phase is called inspiration, or inhaling. When the lungs inhale, the diaphragm contracts and pulls downward. At the same time, the muscles between the ribs contract and pull upward.

Detailed explanation-3: -Aspiration means to draw in or out using a sucking motion. It has two meanings: Breathing in a foreign object (sucking food into the airway).

Detailed explanation-4: -Inspiration (inhalation) is the process of taking air into 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.

Detailed explanation-5: -Inspiration allows air to flow into the lungs. The second phase is expiration. Expiration involves gases leaving the lungs. During inspiration, the diaphragm and intercostal muscles contract allowing air to enter the lungs.