The Trachea
The Trachea is also known as...
The windpipe
The Trachea divides into...
Two tubes
The inner part of the Trachea is covered in...
Hair cells (Cillia)
Veins are thin and not as what as arteries?
Flexible
The Trachea is surrounded in How many rings of cartilage
15-20
Capillaries are how thick?
The tubes the Trachea divides into are called...
bronchi
There are how many blood vessels? What are they called.
3. Arteries, Veins, Capillaries.