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 is the passageway that connects the larynx and the nasal cavity together?
The pharynx
What happens to the diaphragm during inspiration?
It contracts and flattens, moving downward to increase the volume of the thoracic cavity.
What muscles lift the ribs up?
External intercostals
What happens to alveolar pressure during exhalation?
Alveolar pressure becomes slightly higher than atmospheric pressure, causing air to slow out of the lungs.
What is rest breathing?
Rest breathing is normal, quiet breathing that occurs when a person is relaxed and not 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.
What happens during inhalation?
Air moves into the lungs as the chest cavity expands.
What are the muscles of respiration?
They are the muscles that help move air into and out of the lungs during breathing.