| A | B |
|---|
| endocrine gland | ductless or tubeless organs or groups of cells that secrete hormones directly into the bloodstream. |
| thyroid gland | produces hormones that regulate metabolism, body heat, and bone growth |
| parathyroid gland | produces a hormone that regulates the body's balance of calcium and phosphorus |
| hormones | chemical substances that help regulate many of your body's functions |
| pituitary gland | regulates and controls the activities of all other endocrine glands |
| adrenal glands | regulate the body's salt and water balance |
| sterility | not able to reproduce, as a result of too few sperm or sperm of poor quality |
| sperm | male reproductive cells that are transferred to the females body during sexual intercourse |
| testosterone | male sex hormone |
| testes | two small glands that secrete testosterone and produce sperm |
| scrotum | an external skin sac |
| penis | a tube-shaped organ that extends from the trunk of the body just above the testes |
| semen | a thick fluid containing sperm and other secretions from the male reproductive system |
| pancreas | a gland that secretes two hormones - glucagon and insulin |
