the respiratory system

• carrys air to lungs
• adds oxygen to blood
• removes carbondioxide
• maintains acid/base (ph) balance in the blood
• provides vocalization
• it assits in regulating body temp

• nose and nasal cavity
• pharynx
• larynx
• trachea
• bronchi
• lungs

• thorax (chest cavity)
• diaphragm

provide external entrence for air into the respiratory system and the exit for carbon dioxide

passageway for air and food

• main roll creates sound
• air passing through the epiglottis during expiration causes virbations of the vocal cords which produces sound

• long tube formed of smooth muscle and lined with mucous membrane
• held open with cartialginious c shaped rings embedded in muscle tissue
• provides a passageway of air to lungs

two primary bronchi right and left which branch of trachea and into lungs

• primary structures for resp system
• cone shaped comprised of 300 tiny air sacs called alveoli
• alveoli cause lungs to be sponge like and porous
• lungs are encased in serous membranes called the visceral pleura
• slides easily against the parietal pleura so there is little firction between organs during respiration
• lungs are elastic

• divided into three parts
• right pleurl cavity
• left pleural cavity 
• mediastinum
• thorax is lined with pariental pleura
• the membrane provides lubrication for the surfaces of organs during respiration

• dome shaped muscle that seperates thoratic and abdominal cavitys
• attatched to lumbar vertebra, lower ribs and sternum
• chief muscle for respiration

• inspiration
• experation
• rest