Respiration Flashcards
A pharynx is?
An open area that air passes through
Once air enters through the nose it is warmed and filtered it passes through the?
Nasal cavity
A pharynx has an __________ that prevents food from entering the trachea
Epiglottis
The trachea is?
A tube that air moves down. It’s lined with rings composed of cartilage
The bronchi are?
A smaller set of tubes that air passes through
Bronchi branch off into?
Small circular sacs called alveoli
Alveoli contain _______ that moistens the air. This allows?
Water
For the movement of gases through the process of diffusion
What are the thin blood vessels that surround the alveoli?
Capillaries
In inhalation the dome shaped _______ moves down while the __________ muscles raise the rib cage. This creates a partial vacuum in the cavity and _______ pressure inflates the lungs
Diaphragm
Intercostal
Atmospheric
Gas exchange occurs across the?
Thin alveolar walls, between the blood and air
Blood entering the lungs from the bodies tissues contains _______ partial pressure of CO2 and ______ partial pressure of O2
High
Low
Blood entering the lungs from the outside air contains ____ partial pressure of CO2 and ____ partial pressure of O2
Low
high
Hemoglobin has a strong affinity for ____ when partial pressure are high
O2
Lungs expand
Chest enlarged
Less air pressure in lungs than environment
Inspiration
Muscles (diaphragm & ribs) relaxed
Diaphragm dome shaped
Expiration
What structures prevent the collapse of the trachea and bronchi?
Cartilage
Lung tissue carries out an exchange of gasses, what is the name of the circular structure that carries out the exchange?
Alveoli
Oxygen and Carbon dioxide require what substance to diffuse through?
Water
Rapid breathing of air is called?
Hyperventilation
What does hyperventilating do to overall blood oxygen levels?
Increases them
What part of the brain is responsible for breathing rates?
The medulla oblongata
Which muscle forms a dome at the bottom of the lungs?
Diaphragm
What happens to the diaphragm when you breath in?
It flattens
What muscles are located between the ribs?
Intercostal
