True, pulmonary arteries carry the blood from the heart, while pulmonary veins return the blood to the heart.
They would have black and white because grey shows up as lavender or blue in a chicken and it can’t be black or white because it says BW that is together so it would have to be black and white
As the procedure has asked you to do, you require a microscope in order to complete the task. The questions below the circles, can only be answered when you have observed the slides. We cannot simply solve this for you, this is an individual/partner task that requires you to find out yourself.
Petroleum because it is compressed over time and get created into that gooey substance
