Ovulation is the release of a mature egg from the surface lf the ovary. This usually occurs mid cylce, around 2 weeks or so before menstruation. During the follicular phase
The pulmonary veins transport oxygenated blood back to the heart from the lungs, while the pulmonary arteries move deoxygenated blood from the heart to the lungs.)
Could be anything that can help represent the cell membrane visually
I think its the first one
