Blood and blood vessels

Question 1

Blood

Answer 1

• connective tissue consisting of:
  1) plasma ( 55% ) carries antibodies and nutrients, also removes waste products.
  2) Red cells (erythrocytes) carry oxygen and remove carbon dioxide.
  3) White blood cells (leucocytes) are an important part of immune and inflammatory process.
  4) Platelets ( thrombocytes) clotting process.

Question 2

Blood vessels - 5 main types

Answer 2

1) arteries
2) arterioles
3) capillaries (allow exchange of substances between blood and tissues)
4) venules
5) veins (return blood to the heart)

Question 3

Vessel structure

Answer 3

Most (except capillaries) are made up of 3 layers or tunics.

I. Internal Layer (tunicaintima or onterna)