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48. Drinking alcohol during pregnancy is ________.        

37. The result of polyspermy in humans is ________.        

9. In pulmonary circulation, blood flows from the _____ of the heart to the lungs.

33. Of the three germ layers, the mesoderm forms the most body parts.

16. Which of the following is least involved in pulmonary circulation?        

15. What is the function of the hepatic portal system?

29. The foramen ovale ________.        

36. Which of the following is a water soluble vitamin?

28. The ____ is the bone like material that forms the bulk of the tooth.

19. A thrombus (blood clot) in the first branch of the arch of the aorta would affect the flow of blood to the ________.