Grade 9 Nervous and Reproductive Systems

This resource from a grade 9 level explains two key biological systems: the nervous system and the human reproductive system. The section on the nervous system outlines its structure, comprising the central and peripheral systems, and details the roles of the brain, spinal cord, and sense organs in communication and response to stimuli. The subsequent portion on human reproduction discusses its purpose, the process of puberty in both sexes including hormonal changes and physical developments, and describes the anatomy and functions of the male and female reproductive organs. Furthermore, it touches upon health issues related to both systems and methods of contraception.