35+38 Flashcards
what function adaptation does cartilage have over bone in making up the external framework of the nose?
hyaline cartilage maintains shape of the nose but is flexible. this is important for keeping the breathing passages open, but being subject to contact with the external world, it is capable of bending.
what if a patient was stabbed in the chest and the wound punctured the chest wall and let air into the pleural cavity. how might this affect breathing?
lungs function because of the negative pressure in the chest cavity. if the stab wounds open up the chest cavity to the outside, the lungs deflate, which would significantly reduce the ability to breathe.
trace the flow of blood from the liver to the duodenum.
bile from liver flows through L/R hepatic ducts, to common hepatic duct,
what is the common name for the eternal nares?
nostrils
what 3 structures make up the nasal septum?
perpendicular plate of ethmoid bone
vomer
special cartilage
what is the function of respiratory epithelium and the superficial blood vessels in the nasal cavity?
moistens + warms the air coming into the lungs
what is the name of the cartilage of the anterior larynx?
thyroid cartilage
what is the structure that protects the glottis from fluid entering the larynx?
epiglottis
which lung has 2 lobes in humans?
left
what membrane attaches directly to the lungs?
visceral pleura
the trachea branches into two tubes that go to the lungs. What are these tubes called?
main bronchi
where is the tracheo-bronchial tree?
lungs
what small structure in the lungs is the site of oxygen exchange with the blood capillaries?
alveoli
what role do alveoli play in the nature of surface area?
surfactant helps lungs expand
Emphysema is a destruction of the alveoli of the lungs. What effect does this have on the surface area of the lungs?
Decrease surface area, which decreases contact with lungs and blood
the pancreas is an _______
accessory organ