Work Step by Step
Option a. is incorrect. The kidney filters blood of waste products and maintains electrolyte balance in the body. Option b. is incorrect. A pupa is one of the stages in the life of an insect. Option d. is incorrect. The placenta is the organ that nourishes the developing embryo/fetus within the bodies of placental animals. Option c. is correct. The mammary glands are the structures in female mammals that produces the milk that the young use for nourishment.