3 years ago

Why would cells lining a tube-like structure such as the trachea need to be ciliated?

1 answer:

6 0

The cartilaginous structures that ring most mammalian tracheae are ... The trachea islined with a moist mucous-membrane layer composed of cells containing small hairlike projections called cilia. ... Such outgrowths could have been useful to insects exposed by the drying up of a temporary aquatic.

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