Respiratory System Flashcards
Upper Respiratory Tract
Nasal Cavity
Pharynx
Glottis
Larynx
Trachea
Lower Respiratory Tract
Lungs
Left and Right Bronchi
Bronchioles
Alveoli
Function of the Nasal Cavity
- Air is warmed when passing over nasal chamber by the capillaries
- Air is moistened by passing over the surface if mucus membranes.
- Air is cleaned by passing over cilia, trapping particles to the nose or throat
Pathway of Air
Cleaned, Warmed and Moistened
Move to Pharynx
Enter Trachea
Moves down the glottis, while trachea is covered by the epiglottis
Air pass the larynx before continuing down the trachea
Function of Larynx
Allows humans to talk
Purpose of the Respiratory System
Obtain oxygen for cellular respiration
Eliminate Carbon Dioxide from the body
Stages of Human Respiration
- Breathing
- External Respiration
- Internal Respiration
- Cellular Respiration
What is Breathing?
The repetition of Inspiration then Expiration
Inspiration - Inhaling, taking air into lungs from outside the body
Expiration - Exhaling, moving air from the lungs back outside the body
What is External Respiration
Performance of gas exchange - delivery of oxygen to the blood from the lungs and CO2 to the lungs from the blood
What is internal respiration
Exchange if oxygen and CO2 between blood and the body’s tissues and cells
What is Cellular Respiration
Chemical reaction that take place in cells that provide the cell with energy
Respiratory Membrane Requirements
Large respiratory surface
Moist Environment
Close to blood supply
What is the brains role in breathing?
Coordinates breathing movement and rate
Monitors volume of air in lungs and gas levels in blood
What is the role of the Diaphragm and the Intercostal Muscles in breathing?
Control air pressure in the lungs - Changes in air pressure cause air to move in and out if the lungs
The movement of the Diaphragm and the Intercostal Muscles during Inhalation
Intercostal Muscles contract pushing the ribs Up and Out
Diaphragm contracts downwards and flattens
