Airway Avenue
This are the main entrance for air into the body during normal breathing.
Mouth and nose
The microscopic air sacs in the lungs where gas exchange occurs.
Alveoli
The action of drawing air into the lungs.
Inhlation (inspiration)
The part of the brain that sets the basic rhythm of breathing.
Medulla Oblangata
The two main types of blood vessels involved in lung circulation.
Arteries and Veins
These tiny hairs in the nasal cavity filter and trap debris.
Cilia
This gas moves from alveoli into the blood during inhalation.
This major muscle contracts to initiate inspiration.
Diaphragm
These brainstem structures fine-tune the rate and depth of breathing.
Pons
These vessels bring oxygen-rich blood from the lungs to the heart.
Pumonary Veins
The passage that connects the larynx to the bronchi.
The membrane through which gas exchange occurs consists of these two main layers.
Alveolar and cappillary membranes.
The term for the amount of air moved in and out during normal breathing.
Tidal Volume
These receptors detect changes in CO₂ and pH levels.
Central chemoreceptors
The pulmonary capillaries wrap around these structures.
Alveoli
These tubes branch off the trachea and direct air to each lung.
Bronchi
This principle explains how gases move from high to low partial pressure.
Diffusion
The pressure in the chest must do this to allow air to flow in.
Decrease (lower)
High carbon dioxide levels stimulate breathing via this feedback mechanism.
Negative Feedback
This side of the heart pumps blood to the lungs.
Right side
These are the smallest conducting airways that lead to the alveoli.
Terminal bronchioles
The protein in red blood cells that binds with oxygen.
Hemoglobin
The maximum volume of air that can be forcibly exhaled after full inhalation.
Vital Capacity
This nerve carries impulses from the brain to the diaphragm.
Phrenic Nerve
This process describes the matching of airflow (ventilation) to blood flow (perfusion) in the lungs to optimize gas exchange.
Ventilation-perfusion (V/Q) matching