This illustration depicts the human endocrine system highlighting the thyroid gland in pink, parathyroid glands in pink, adrenal glands in yellow, pancreas in yellow, and testes in pink. The glands shown are integral to the endocrine system, which secretes hormones regulating various body functions. Key hormones and functions include thyroid hormone for metabolic rate (from the thyroid gland), insulin and glucagon for blood glucose levels (from the pancreas), and testosterone for male reproductive functions (from the testes). The adrenal glands are responsible for producing hormones like cortisone, which help manage stress.