Guided Notes: Fetal Circulation Page 1: Fetal Circulation KT = Key Terms; FQ = Focus Question; VR = Video Reflection KT: Jot down terms and definitions that are new to you. You will see them used in the lesson. Page 2: Fetal Circulation (Continued) FQ: What is the path of blood circulation through a fetus, and how does it change after birth? VR: What important information did you learn about from this video? Fill in the blanks below, replacing the "?" with the correct answer. Word Bank: abdomen, arteries, blood pressures, close, deoxygenated, diffuse, ductus arteriosus, ductus venosus, lungs, never, oxygenated, placenta, umbilical cord, veins, villi 1. The umbilical cord forms from the baby's ? when he's just a tiny embryo. 2. The umbilical cord contains one vein that sends baby's body, and two arteries that remove the ? ? blood into the blood. 3. The umbilical vein of the baby's cord passes into his inferior vena cava by way of a special vessel called the ? . 4. When blood returns to the heart, a portion of it flows into the lungs, but the largest fraction of blood flows through the lower extremities, and into the two ? ? , down to the baby's of his cord. 5. The source of all of baby's oxygen, nutrients, and waste disposal is the ? . 6. The blood of the umbilical cord moves into smaller blood vessels that lie within 1 the ? of the placenta. 7. Oxygen, carbon dioxide, nutrients, and wastes can ? through the villi tissues and transfer between the mother's blood and the blood vessels of the baby. 8. The mother's ? carry carbon dioxide and wastes away from the placenta. 9. The ? carries the nutrients and oxygen back to the baby. 10. Mother's blood and baby's blood ? mix in the placenta. The mother's blood contains immune system substances that would recognize the baby's blood as something alien. 11. When the baby takes his first breath and his umbilical cord is cut, the ? in various sections of his vascular system. This change causes the ductus venosus and the ductus arteriosus to 12. The blood is redirected to the ? . ? to receive oxygen and release carbon dioxide. Sample Question: Which structure functions in a baby but not in a fetus? a. Lungs b. Heart c. Blood d. Nerves 2

Anatomy and Physiology Fetal Circulation

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