General outline skin is the biggest organ of the human body is composed of epidermis dermis and some accessory organs the function of the skin: barrier and protection
Reproductive System a Sex, Gender, Reproduction Germ Cells: sperm and ovum Haploid) Sex hormones. Male---Androgens(Testosterone) Female---Estrogen, Progestogen Developmental stages: infant, child, puberty, adult, menopause and old