Respiratory Anatomy
What is the membrane that surrounds lungs and decreases friction during breathing?
Pleura
What phase of breathing shows air moving into the lungs?
Inspiration or Inhalation
What is the muscle that contracts and moves down during inhalation?
Diaphragm
What is tidal volume?
The amount of air that is inhaled or exhaled during a breath
What percentage of the respiratory cycle is inhaled during resting breathing?
40%
What is the primary muscle for inspiration?
Diaphragm
What phase of breathing shows air leaving the lungs?
Expiration or Exhalation
Which muscle grouo is more active during conversational speech?
Abdominal muscles
What is the pressure that drives airflow inside the alveoli?
Alveolar pressure
What percentage of the respiratory cycle is exhaled during resting breathing?
60%
What structures make up the upper respiratory tract?
The upper respiratory tract generally includes the nose, nasal cavity, and pharynx.
What is the internal respiration?
Is the gas exchange that occurs between the systemic capillaries and the body's tissues
What muscles are used during forced expiration?
Forced or active expiration requires muscle contraction to actively decrease thoracic volume and push air out.
What happens to alveolar pressure during exhalation?
Alveolar pressure becomes slightly higher than atmospheric pressure, causing air to flow out of the lungs.
What happens to airflow during speech breathing?
Airflow is carefully controlled and released slowly to support speaking.
What prevents the trachea from collapsing during inhalation?
The trachea is kept open by a series of C-shaped rings of hyaline cartilage. These rigid rings provide structure while allowing the esophagus to expand slightly into the back of the trachea when swallowing food