Human Reproductive System I Vocabulary Testerone sex hormone that is made in the testicles. Testosterone hormone levels are important to normal sexual development and functions. During puberty (in the teen years), testosterone helps develop features like body and facial hair, deeper voice, and muscle strength. Gamete sex cells (sperm +egg) The human reproductive system serves the purpose of producing the cells and structures necessary to produce more people. It also does this through regulating hormone levels. Label Structure What it does A Bladder ● Stores urine B Vas Deferens ● Internal structure that modifies sperm before delivering it to penis C Urethra ● Carries sperm and urine to penis D Penis ● Delivers fluids to outside of body Used for internal fertilization ● E Testis (testes) ● ● Produce sex cells (sperm) Temp. generally 1-2 C cooler than normal body temp for optimum sperm production ● ● 1. 2. Question 1 2 Answer Store sex cells Produces testerone 3. Explain how a malfunction in the structure labeled B would influence sex cell production. Explain how it would influence fertilization.