330 THE URINARY APPARATUS 



18. Name the portions of the bladder. 



19. Through what structure does the urine leave the bladder? 



20. Describe how the waste products of the blood pass through 

 the capsule of Bowman during urine secretion. 



21. What function do the cells of the uriniferous tubules play as 

 regards the elimination of urea, uric acid, etc., from the blood- 

 stream? 



22. How does the venous blood from the capillaries of the kidney 

 reach the venous system? 



23. What resulting products of metabolism does the urine repre- 

 sent? 



24. How much urine should be passed daily by a healthy indi- 

 vidual? 



25. What is the normal color of urine? 



26. What end-product does urea represent in the urine? 



27. Will a diet rich in protein increase the amount of urea? 



28. What are the functions of the skin? 



29. Name the two principal layers of the skin. 



30. What is the function of the subcutaneous tissue? 



31. Name the appendages of the skin. 



32. Name the parts of a nail. 



33. Name the, functions of hairs. 



34. Name the parts of a hair. 



35. Describe a hair follicle. 



36. What muscles cause hairs to stand erect? 



37. Which layer of the skin lodges the sebaceous glands? When 

 do they empty? In what portions of the body are they most abun- 

 dant? Absent? 



38. What is the secretion from the sebaceous glands called? Its 

 function? 



39. Describe vernix caseosa. 



40. In which layer of the skin are the sweat glands located? 



41. Do they possess ducts, and when do they pour out their 

 secretion? 



42. What are the functions of the sweat glands? 



43. Is sweat acid or alk.aline in reaction? 



44. Does the secretion of sweat aid heat dissipation? 



45. Name the nerves which stimulate the. cells of the sweat glands 

 to secrete, also regulate the blood-supply to a sweat gland. 



