Final answer:
The ovaries in females and the testes in males are part of the endocrine system, which is responsible for producing sex hormones and gametes.
Step-by-step explanation:
The ovaries in females and the testes in males are part of the endocrine system. While other systems like the central nervous system, which comprises the brain and spinal cord, are involved in the control and regulation of bodily functions, including the endocrine system, it is the endocrine system that includes the gonads. These gonads, which are the testes in males and ovaries in females, are responsible for producing sex hormones and gametes. The sex hormones, such as testosterone and estrogen, play crucial roles in reproductive functions, including sexual development and maturation. Therefore, the correct answer to the given question is d. endocrine system.
The ovaries in females and the testes in males are part of the endocrine system. The endocrine system is responsible for producing and releasing hormones that regulate various bodily functions, including reproduction. In females, the ovaries produce estrogen and progesterone, while in males, the testes produce testosterone. These hormones play a crucial role in sexual development and functioning.