Mechanics of breathing Flashcards
how do you breath through the nasal passage and lungs
air is drawn into the body via the nose or mouth
mechanism of breathing in
inhalation
in the nose tiny hairs and mucus are in the nose filter the air preventing….
larger dust and pollen particles from reaching the alveoli
mucus moistens the air, making it easier for
the alveoli to absorb.
Air travels through the larynx, trachea, bronchi and bronchioles to the alveoli, where
oxygen passes into the bloodstream.
Air travels through the larynx, trachea, bronchi and bronchioles to the alveoli, where
oxygen passes into the bloodstream.
when breathing in (inhalation) intercostal muscles between the RIBS CONTRACT,
pulling the chest walls UP and OUT
the diaphragm muscle below the lungs contracts and flattens, increasing
the size of the chest
the lungs increase in size, so the pressure inside them
Falls. (This causes air to rush in through the nose or mouth.)
mechanisms of breathing out
exhalation
when you breath out intercostal muscles between the ribs relax so that the
chest walls move in and down
the diaphragm muscle below the lungs relaxes and bulges up which
reduces the size of the chest
the lungs decrease in size so the pressure inside increases and air is …
pushed up the trachea and out through the nose or mouth.
