Hormones are chemical messengers that are produced by endocrine glands and have specific target tissues. Here are some examples of hormones, their sources, and target tissues:
1. Estrogen - produced by the ovaries and placenta; target tissues include the uterus, vagina, breast, and bone.
2. Progesterone - produced by the ovaries and placenta; target tissues include the uterus, breast, and brain.
3. Testosterone - produced by the testes and adrenal glands; target tissues include the testes, muscle, bone, and brain.
4. GnRH (Gonadotropin-releasing hormone) - produced by the hypothalamus; target tissues include the pituitary gland.
5. LH (Luteinizing hormone) - produced by the pituitary gland; target tissues include the ovaries and testes.
6. FSH (Follicle-stimulating hormone) - produced by the pituitary gland; target tissues include the ovaries and testes.
7. Inhibin - produced by the ovaries and testes; target tissues include the pituitary gland.
These hormones play important roles in regulating reproductive function, growth and development, and metabolism.