Respiratory System

Parts Lungs Air passages

Functions Takes in oxygen Removes carbon dioxide Body has 4-6 minute supply of oxygen

Larynx Voice box Layers of cartilage Contains Largest is the thyroid cartilage commonly called the Adam's apple Contains Vocal chords Vibrate on exhaled air to produce sound The tongue and lips act on the sound to produce speech Epiglottis Flap of cartilage that closes the larynx during swallowing and prevents food and liquids from entering the trachea

Trachea Windpipe Series of “C” shaped cartilage to keep the tube open to the back Divide into the right and left bronchi Continues to divide into smaller bronchioles End in the alveoli Air sacs

Alveoli One cell thick and surrounded by capillaries Look like a cluster of grapes Allow the exchange of oxygen and carbon dioxide

Lungs Right lung 3 lobes Left lung 2 lobes due to the heart

Diaphragm Dome-shaped muscle that separates the thoracic cavity from the abdominal cavity

Process of Respiration Controlled by the medulla oblongata in the brain An increase in amount of CO2 in the blood , increases the rate of respiration Both involuntary and voluntary process