Explore the intricacies of the human nervous system in this comprehensive 5-hour biology course designed for Grade 10 students. Delve into human biology and health, focusing on the central nervous system and its functions. Examine the effects of drug abuse, including alcohol and khat, on the body. Investigate the structure and function of various sense organs, including the retina, ear, and skin. Learn about the endocrine system, with special attention to adrenaline and the gonads. Understand the menstrual cycle and its hormonal regulation. Gain valuable insights into the complex interplay between different body systems and their impact on overall health and well-being.