Gaseous Exhange
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Where does air move through into
The nasal cavity
What are the two kinds of cell lines that line the nasal cavity
Ciliated epithelial cells and goblet cells
What are ciliated epithelial cells
They have tiny hairs called cilia that trap and remove dust and germs in the air that you breathe in
What does Goblet cells do
Make slimy liquid called mucus . The mucus keeps the surface of the nasal cavity moist and traps the dust and germs that you breathe in
What are the small blood vessels in the nasal cavity called
Capillaries that are close to the surface
What does the blood in the capillaries do
Warms the air as it passes through the nasal cavities.
What is the throats known as
The pharynx
Where is the pharynx situated
At the back of the nasal cavity
What system is the pharynx part of
The digestive system
What does the pharynx open into
The trachea and the oesophogus of the digestive system
Where is the larynx
At the top of the trachea
What opening does the larynx have
A glottis that opens into your trachea
What is covering the glottis and what does it do
The epiglottis covers the glottis when swallowing food or water, preventing food from going into the trachea
What are inside the larynx and what do they do
Two membranes called the vocal chords inside the larynx , they vibrate and make various sounds as the air is forced through them
What does the trachea lead Into
The lungs
What does the trachea have inside it
C shaped cartilage rings
What do the c shaped cartilage rings do
They keep the trachea open all the time so that air can pass through freely into and out of the lungs
What lines the trachea
Ciliated epithelial and goblet cells
What does the trachea branch into
Two bronchi
How are bronchi and the trachea the same
Similar in structure but the trachea are narrower
What does each bronchus lead into
A lung
What happens when a bronchus enters each lung
Branches into smaller tubes called the bronchioles
Bronchioles don’t have cartilage rings or ciliated epithelium
True
What does each bronchiole lead to
A bunch of small air sacs called the alveoli