rp5 - heart dissection

+ biological drawings

give and explain 2 hazards of the heart dissection and explain how they can be overcome:

• scalpel/scissors - sharp/could cut skin → cut away from fingers

• heart - biohazard, risk of contamination → wear lab coat, goggles, gloves. wash hands, disinfect equipment/surfaces prior to/after dissection. dispose of heart safely in a bin that will be taken away on the same day

give an overview of the heart dissection:

• before cutting - identify coronary arteries. run water into top of heart to see valves close, squeeze to see valves open

• cut down each side of heart - identify tendinous cords, examine thickness of walls, stick finger/needle through aorta/pulmonary arteries

give the ‘do’s of a biological drawing:

• include a title

• take proportions into account

• use single, clear, joined lines

• write labels horizontally

• include magnification and scale (where relevant)

give the ‘don’t’s of a biological drawing:

• shading

• sketchy lines

• arrowheads

• hanging lines