mammalian gas exchange Flashcards
where are goblet cells found
lining the air ways
what do goblet cells secrete
mucus
why do goblet cells secrete mucus
trap pathogens and dust to stop them reaching the alveoli
what is the function of ciliated epithelial cells
moves mucus upwards towards the throat
why do we need cilia
prevent lung infections
what is the function of smooth mucles
allows diameter of trachea to be controlled
what does the smooth muscle do during exercise and why
relaxes making tube wider, so there’s less resistance to airflow and air can flow in and out
what is the function of rings of cartilage
provide bronchi and trachea with support when breathing preventing them from collapsing
what do elastic fibres help the process of
breathing out
how do elastic fibres help breathing out
when you breathe in the lungs inflate and fibres are stretched however they recoil when you breathe out
what structures does the trachea contain
goblet cells, cilia, smooth muscle, elastic fibres and cartilage
what structures does the bronchi contain
goblet cells, cilia, smooth muscle, elastic fibres and cartilage
what structures does the alveoli contain
only elastic fibres
