Thyroid histology Thyroglobulin (TGB) - help in formation and storage of thyroid hormones Follicular cells - secrete thyroid hormones (T3, T4) Blood capillary Parafollicular cells - secrete calcitonin Follicles

Adrenal histology Adrenal medulla - secretes epinepherine and norepinephrine Zona glomerulosa - secrete mineralocorticoids Zona fasciculata - secretes glucocorticoids Zona reticularis - secretes androgens Adrenal medulla - secretes epinepherine and norepinephrine Zona reticularis - secretes androgens Zona fasciculata - secretes glucocorticoids Zona glomerulosa - secrete mineralocorticoids Adrenal medulla - secretes epinepherine and norepinephrine Adrenal cortex - secretes glucocorticoids, mineralocorticoids and androgens Adrenal cortex - secretes glucocorticoids, mineralocorticoids and androgens Capsule - protective layer Capsule - protective layer Capsule - protective layer

Pancreas histology Blood vessel Blood vessel Acini cells - exocrine Pancreatic islet - endocrine Pancreatic islet - endocrine Pancreatic islet - endocrine Acini cells - exocrine

Ovaries histology Follicular cells - secrete hormones (estrogen, progesterone) Oocyte - cell that will eventually become egg/ovum Follicles - composed of follicular cells that secrete hormones (estrogen, progesterone) and developing oocyte Follicles - composed of follicular cells that secrete hormones (estrogen, progesterone) and developing oocyte

Testis histology Seminiferous tubule - with developing germ cells and Sertoli/sustentacular cells (secrete hormone - inhibin) Leydig/interstitial cells - secrete hormone testosterone Leydig/interstitial cells - secrete hormone testosterone Seminiferous tubule - with developing germ cells and Sertoli/sustentacular cells (secrete hormone - inhibin)