required practical 5

Question 1

what is practical 5

Answer 1

dissection of animal or plant gas exchange system or mass transport or of organs within such a system

Question 2

aim of 5

Answer 2

Dissections are essential to a complete understanding of ​internal biological functions​​.

Example dissections include: heart, fish gills, insect respiratory system or lungs. ​

There are some ​ethical issues​​ with dissection, including the way in which the animals are raised and killed.

Question 3

5 equipment list

Answer 3

● Scalpel
● Scissors
● Tweezers
● Pins
● Dissection board
● Newspaper/paper towels
● Biological specimen

Question 4

5 risk assessment

Answer 4

biohazard - contamination

disinfectant - flammable

sharp tools

Question 5

5 - drawing

Answer 5

● Use a sharp HB pencil
● Make sure drawing is large enough for detail and labels (at least half a page
advisable)
● No shading
● Use single and continuous lines (no sketching)
● Label lines should be drawn with a ruler
● Do not cross label lines
● Lines should not have any arrows
● Label all the structures
● Do not use colour
● Include a magnification/scale