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Sophia - Human Biology - Unit 5 Challenge 3.

Sophia - Human Biology - Unit 5 Challenge 3. 1 — Fertilization and Early Development Understand the process of fertilization and the earliest human developments. What body part develops from the ectoderm? • a.) Bladder • b.) Muscle • c.) Pituitary gland • d.) Heart 2 — Implantation Determine the process of implantation. Which of the following statements about ectopic pregnancy is true? • a.) Menstruation occurs and the fertilized egg is expelled from the uterus. • b.) The fertilized egg fuses with the ovary from which it was released. • c.) The fertilized egg attaches to the endometrium in the uterus. • d.) The fertilized egg implants somewhere other than the endometrium. 3 — Placenta Identify characteristics of the placenta and other structures associated with the baby's nourishment. Which of the following is a sac-like structure that gives rise to umbilical blood vessels? • a.) Placenta • b.) Allantois • c.) Yolk sac • d.) Amnion 4 — Embryonic and Fetal Development Determine the stages of development of an embryo during pregnancy. If a woman is just beginning to feel the movements of her developing fetus, how many months has she most likely been pregnant? • a.) Three months • b.) Two months • c.) Four months • d.) Five months

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