Respiratory System(Human)

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Aim: What are the parts and functions of thehuman respiratory system?

I. Parts of Human Respiratory System

A. Nasal Cavity. Warms the air !capillary "eds#

$. %ilters the air !cilia and mucus#

&. 'oistens the air !mucus mem"ranes#

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(. Pharyn) !*hroat#

. Air +ust passes throu,h

C. -aryn) !Home of the vocal chords#

. Air +ust passes throu,h

. *rachea !Windpipe#

. Held open "y rin,s of cartila,e

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$. Cilia / tiny hairs that s0eep mucus 0ith dust

particles up0ard to0ards the pharyn).

1. (ronchi !(ronchus2sin,ular#

. *0o tu"es that "ranch off from tracheaand direct air to each lun,.

$. Also held open 0ith cartila,e rin,s.

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%. (ronchioles

. Smallest su"division of "ronchial tu"es.

$. 1ach "ronchiole terminates 0ith a cluster

of alveoli.

&. No cartila,e rin,s.

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3. Alveoli !Alveolus2sin,ular#

. Alveoli are sites of ,as e)chan,e. Alveoliare surrounded "y "eds of capillaries.

$. *he alveoli are the respiratory surfaces

in the human.

a. 4)y,en diffuses out of the alveoli intothe capillaries.

".Car"on dio)ide diffuses out of capillariesinto the alveoli to "e e)haled out of "ody.

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3. Alveoli !Alveolus2sin,ular#

. Alveoli are sites of ,as e)chan,e. Alveoliare surrounded "y "eds of capillaries.

$. *he alveoli are the respiratory surfaces

in the human.

a. 4)y,en diffuses out of the alveoli intothe capillaries.

".Car"on dio)ide diffuses out of capillariesinto the alveoli to "e e)haled out of "ody.

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