Respiratory System Flashcards
alveoulus
a tiny air sac in a lung where gas exchange occurs
body system
a group of organs that work together to perform a function
breathing
the process used by animals to exchange gases with the atmosphere
bronchiole
a tube that carries air through a lung
capillary
a tiny blood vessel where substances pass to and from the blood
carbon dioxide
a gas produced as waste when cells release energy
cellular respiration
the process used by all living cells to release energy
diaphragm
a large sheet of muscle that contracts to draw gas into the lungs
diffusion
the movement of molecules from an area of high to low concentration
epiglottis
a flap of cartilage that stops food entering the trachea
gas exchange
the movement of oxygen into the blood and carbon dioxide out of it
intercostal muscle
a thin band of muscle between two ribs that helps breathing
larynx
the upper part of the trachea, containing the vocal chords
lung
an organ where gas exchange occurs between air and blood
nostril
an opening in the nose where incoming air is warmed and filtered
trachea
the main airway between the throat and the lungs
