46. Muscle tissue is formed by the ________.        

25. The receiving chambers of the heart include the ________.        

31. Implantation begins six to seven days after ovulation.

19. Which of the following provides the greatest surface area for gas exchange?        

47. The heart murmur is due to complete closure of the pulmonary valve and regurgitation of pulmonary trunk blood during diastole.

28. The parietal pericardium ________.        

14. Which statement about CO2 is FALSE?  

6. The secretions of the bulbourethral glands neutralize traces of acidic urine in the urethra and serve as a lubricant during sexual intercourse.

19. Secretion of progesterone stimulates ________.        

39. The left side of the heart pumps the same volume of blood as the right.