Blood vessels

Question 1

Structure of Blood vessels

Answer 1

3 layers
Inner- Tuncia intma
Outer- Tuncia adventitia
Middle- Tuncia Media

Question 2

Tuncia intima

Answer 2

Inner layer of blood vessels.
Made of flattened endothelial cells
Supported by connective tissue basement membrane

Question 3

Tuncia adventitia

Answer 3

Outer later of blood vessels
Works as a protective sheeth
Made of loose collagen and elastin fibres that attach the vessel to the surrounding tissue

Question 4

Tuncia media

Answer 4

Middle layer of blood vessels.

Made of muscle cells with collagen fibres

Question 5

systemic circulation

Answer 5

flow of blood around the body.

Question 6

When blood is in the arteries it is at high pressure… How does this occur?

Answer 6

Arteries have think smooth muscle walls

allowing blood to keep high pressure while reaching around the body

Question 7

Why do veins have lower pressure then arteries?

Answer 7

They have thin walls and are wider with less smooth muscle.

This heightens their risk of collapsing.

Question 8

What controls the vasoconstriction/dilation of arteries and arterioles?

Answer 8

Autonomic nervous system via neurotransmitters (noradrenaline)
or via hormones (adrenaline and antiduretic hormone) from the endocrine system.