Problem
Consider the variation in reproductive systems within the animal kingdom. Select 1 or 2 traits and compare and contrast the human situation with other members of the animals kingdom. Two examples of traits are sexual reproduction and menopause. Describe the development of the human embryo from the formation of the zygote to the point where the three embryonic germ layers develop. List the types of adult tissues that are derived from each of these germ layers. Be prepared to discuss how disruption early in development can cause major problems in the body of the developing individual.