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85 Describe the structure of the mammary gland: alveoli, lobules, mammary ducts.86 What are the roles of hormones prolactin and oxytocin in lactation?87 What are the functions of the following anatomical structures: placenta, amnion, amniotic fluid, allantois, yolk sac, chorion, umbilical cord, chorionic villi?
88 List the stages of embryonic development (zygote, morula, blastula, gastrula) and describe each stage.89 What is “decidua” and what role does it play?90. How is sex determined by our chromosomes?