respiratory system Flashcards
mucous membrane
moistening air, warming air, filters the air, antiseptic function
pharynx
open space that connects nasal passages and the mouth
trachea
connects pharynx to lungs
larynx
upper end of the trachea, vibrates when air is forced through it when a person speaks
epiglottis
a small flap of cartilage that covers the opening towards the trachea and prevents food from entering the lungs
lungs
situated in the thoracic cavity
surrounded by a double membrane known as the pleura
diaphram
sheet of muscle that extends across the bottom of the thoracic cavity
diffusion
is the movement of a substance from an area f high concentration to an area of low concentration
gaseous exchange
movement of gasses over a membrane from an area of high concentration to an area of low concentration
cellular respiration
is a set of metabolic reactions that occur within the cells to create energy