Question 4 Blood as a Tissue

Blood is one of the many tissues of the body.

(i) Explain what is meant by a tissue.

[ 2 ]

(ii) White blood cells are important in the body's defence mechanisms. The images below are a photomicrograph (A) and a diagram (B) of two types of white blood cells.

                            A                                         B

Image

Image

Identify the two white blood cell types in A & B above.

A

B

[ 2 ]

(iii) State where in the body that white blood cells are manufactured

[ 1 ]

(iv) State ONE difference between the structure of a white blood cell and that of a red blood cell.

[ 1 ]

(v) In terms of white blood cells, explain Histocompatability Testing and under what circumstances could this test be required.

[ 4 ]

[Total: 10]