12. Which organ serves as storage of urine?
a. renal artery
b. renal vein
c. ureter
d. urinary bladder

13. What organ serves both as an excretory as well as a reproductive organ?
a. renal artery
b. ureter
c. urethra
d. urinary bladder

14. What do you call the removal of wastes in the body?
a. breathing
b. defecation
c. excretion
d. micturation

15. The kidneys clean the blood in the body once every
a. 20 min.
b. 30 min
C. 40 min.
d. 50 min.

16. Homeostasis is a function of both the integumentary and excretory systems. The integumentary do this by:
a. keeping the body at a constant temperature
b. keeping the body fluids at a constant level
c. keeping the body from harm
d. keeping the body healthy

17. What are the main functions of both the integumentary and excretory system?
a. absorb waste and maintain homeostasis
b. excrete wastes and maintain homeostasis
c. provide brain information
d. maintain body's balance

18. The inner layer of the skin is the
a. dermis
b. epidermis
C. sebaceous
d. subcutaneous

19. On which layer do we find cone like elevations responsible for fingerprints?
a. dermis
b. epidermis
c. sebaceous
d. subcutaneous

20. Which of these protects us from harm and contains nerve endings that respond to different sensations?
a. large intestine
b. liver
c. lungs
d. skin​