Respiratory System

Respiratory System
Respiratory Structures
cells use oxygen and produce carbon dioxide

the RS (Respiratory System) brings the needed oxygen into and eliminates CO2 from the body

blood transports these gases

carrying O2 to tissues

carrying CO2 to lungs




Organs




nares (nostrils)

air enters nose through here

Nasal cavity

air passes through this after nares

Pharynx

muscular tube that carries both food and air through most of its length

Larynx

Trachea

held open by incomplete rings of cartilage

divides into right and left main bronchus

Right main (primary) bronchus

Left main (primary) bronchus

Right and Left lung

Diaphragm

, each lung is surrounded y 2 layers of serous membrane aka pleurae

the relationship between pleurae and lungs can be demonstrated by pushing a fist into a water filled
balloon

balloon - pleurae

fist - lung




the balloon wraps around the fist when pushed

opposite surfaces of the balloon almost touch

inner part of balloon that wraps around fist - visceral pleura

outer part of balloon - parietal pleura

water filled space between two layers - pleural cavity

the visceral and parietal pleurae are actually a continuation of the same membrane

visceral pleura parietal pleura pleural cavity

part of pleurae lines contains pleural fluid

covers surface of lungs mediastinum

diaphragm

thoracic wall




Visceral and Parietal Pleurae
enclose each lung in a separate sac

parietal pleurae

lines the interior thoracic wall

lines the mediastinum, superior surface of