Life greatest miracle

watch video answer question https://www.youtube.com/watch?v=vA0xZ3K_0q8 1. Even though the testes produce billions of sperm, no two sperm cells are alike. No two eggs produced in the ovary are alike. Why is each gamete unique? 2. In human development, where in the body does fertilization take place? 3. How do human eggs move down the Oviducts? 4. How do sperm reach the egg? 5. What is the “zona” (zona pellucida)? How do sperm recognize and bind to the egg? How do sperm penetrate the zona to fertilize the egg? 6. Is the process of meiosis complete when the egg is released from the ovary? When does the final stage of meiosis take place in human development? 7. Is gastrulation in humans similar to sea urchins, frogs, or birds? Explain. 8. Name two adult body parts or structures that develop from each of the germ layers: outer (ectoderm), middle (mesoderm), inner (endoderm). 9. During development differentiation (specialization) of cells takes place to form heart cells, nerve cells, cartilage, muscle, brain cells, etc. In general, how do cells differentiate—what is happening at the molecular level? How does a group of cells know to develop into a particular structure—how are cells talking to each other? 10. The gonads are initially undifferentiated: they can develop into either male or female. How do gonads differentiate into testicles? (What gene on what chromosome is important?) 11. What is the function of the placenta? 12. How old is the embryo when all the organs are in place (not totally functioning, but formed)? 13. What is the length of a human embryo at 2 months after fertilization? 14. Most differentiation occurs early in human development. According to the film, what is primarily happening during the last trimester? 15. Name two events that occur during the birth process. https://www.youtube.com/watch?v=sCp9tiEiQEU watch video answer question below around 75-100words What was your perception of birth before watching this film? Has your perception of birth changed since watching this film? If you were pregnant, what would your birth plan look like?