Chapter 9: Respitory System Flashcards
Upper Respiratory System
Nose and Pharynx
Filters, warms and moistens air
The Respiratory System Functions
Provide body with oxygen and carry away the carbon dioxide
Gas exchange
Expiration
Inspiration
Lower Respiratory System
Epiglottis, Larynx, Trachea, Bronchi, Bronchioles, Lungs, and Alveoli
Delivery to blood stream
Nose
Adjusts incoming air
Filtration by hair and mucosa
Warming and moistening
Ciliated odor receptor cells
Pharynx
Passage of food and air
Tonsils
Lymph tissue defense
Epiglottis
Blocks airway when swallowing food
Larynx
Adjustable entryway that produces the voice
Vocal cords
Mucosal folds supported by ligaments
Vibrate when air passes
Pitch from width of opening
Volume from amplitude of vibration
Trachea
Reinforced tube connecting upper to lower tract
Lined with mucosa producing goblet cells and sweeping ciliated - epithelium
Bronchial Tree
The trachea divides into right and left bronchi
Branches- bronchioles
Lungs
Site of gas exchange in the thoracic cavity
Alveoli
an air cell of the lungs, formed by the terminal dilation of tiny air passageways.
Breathing
Air enters through the trachea and bronchial tree
It’s a continuous column
Muscles control in breathing(inhalation)
Increase thoracic cavity size for inhalation
Muscles contract pulling ribs out and diaphragm down
Lungs expand because thoracic cavity sealed
Draws air in
