Epithelial cells line the cavities and suffices of blood vessels and organs
Answer:
Voluntary muscles are muscles that you control; involuntary muscles are muscles that are controlled by the brain, etc and doesn't need your control in order to contract...
Artificial selection is the process by which humans use animal breeding and plant breeding to selectively develop traits by choosing which typically reproduce and have offspring together. An example of artificial selection in this case is broccoli and brussels sprouts crossing.