DISSECTING GAS EXCHANGE SYSTEMS Flashcards
What should you make sure you wear
lab coat
What condition do disecting tools need to be
clean, sharp and free from rust
How do you make the lungs inflate
insect a piece of rubber tubing to the trachea and pump air into the lungs using foot or bicycle pump
How should you open the trachea and why
cut it lengthways down the gap in the C-shaped rings, as the cartlidge is tough
What tool should you use to cut the trachea
dissecting scissors and scalpel
What will the tissue of the lung feel like and why
spongy due to the air in the alveoli
What must you do after you dissect the lung and why
wash hands and disinfect work surfaces , to remove bacteria that could cause poisoning
Where should you place the item you are going to dissect
in a dissection tray or on a cutting board
How do you remove the gills
push back the operculum and use scissors to carefully remove the gills
How do you reach the trachea of insects to examine
cut and remove a piece of exosceleton from the length of the insects abdomen
How do you make the trachea of insects visible
using a syringe to fill the abdomen with saline solution to see a network of thing, silvery-grey tubes
What are the ethical issues of dissecting animals
1) some people believe it is morally wrong - to kill animals for dissection (unnecessary), however many have already been killed for meat
2) fear that animals used for disections are not raised/killed in humaine way
