Lecture 2 - How To Examine Cells And Tissues

Question 1

Define: tissue

Answer 1

Collection of similar cells that work together to form a specific function.

Question 2

Name the 4 types of biopsies

Answer 2

1) surgery
2) the use of scraping methods (curettes)
3) sharp needles (needle, pipelle, punch biopsy)
4) direct venepuncture

Question 3

Why do samples need to be fixed?

Which fixatives are used?

Answer 3

Samples need to be fixed as they are no longer under the protection of the immune system.
Fixing prevents the sample from decaying.

Buffered formalin is normally used