Made by beta cells, decreases blood sugar levels primarily by accelerating the transport of glucose into the body cells, where it is oxidized for energy or converted to glycogen or fat for storage
Glucagon
Made by alpha cells, acts antagonistically to insulin. When blood sugar levels are low, it stimulates the liver, its primary target organ, to break down glycogen stores into glucose and subsequently to release the glucose to the blood
Seminiferous tubules
Where sperm is made
Leydig cells
Located between the seminiferous tubules, stimulated by LH to synthesize testosterone
Sertoli cells
Stimulated by FSH to regulate testosterone levels
Follicle
Secretes estrogen which is important in developing secondary sex characteristics
Corpus luteum
After ovulation, secretes progesterone, a hormone important for developing and maintaining uterine wall
