Biology STAAR Practice Test 2025 - Free State of Texas Assessments of Academic Readiness Practice Questions and Study Guide

The testes and ovaries play a crucial role in the endocrine system by secreting hormones that are essential for reproductive functions. In males, the testes produce testosterone, which is responsible for the development of male secondary sexual characteristics, sperm production, and various other functions related to male reproductive health. In females, the ovaries primarily produce estrogen and progesterone, hormones that regulate the menstrual cycle, support pregnancy, and influence the development of female secondary sexual characteristics. These hormones are vital for proper reproductive health, fertility, and overall sexual function. Thus, the key function of the testes and ovaries in the endocrine system is their role in secreting hormones that govern reproductive processes.