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Transcript
Endocrine System Histology and Models ENDOCRINE SYSTEM Questions • • • • Function of the endocrine system: to maintain homeostasis Thymus gland: cortex and medulla (site of maturation of white blood cells) Thyroid gland (secretes thyroid hormone and calcitonin) Parathyroid gland (secretes parathyroid hormone, which increases blood calcium) • Adrenal gland: Capsule, cortex (secretes aldosterone to increase salt reabsorption which raises blood pressure, androgens and estrogens, and cortisol); medulla (secretes epinephrine) • Pituitary gland: – Posterior pituitary (AKA neurohypophysis or pars nervosa) secretes oxytocin and ADH – Anterior pituitary (AKA adenohypophysis or pars distalis) secretes MSH, GH, ACTH, PRL, TSH, LH, FSH. • Pineal Gland: Pinealocytes, pineal sand (secretes melatonin) ENDOCRINE MODELS • • • • • • • Thyroid gland Adrenal gland Thymus gland Pituitary gland Pineal gland Ovary/Testes Pancreas Adrenal and Thyroid glands Thyroid Gland Parathyroid Glands Thymus Gland Pituitary gland Pineal gland Ovary Testes Pancreas Adrenal gland Kidney Thyroid Gland Secretes calcitonin and thyroid hormone Thyroid Gland SKIP SKIP SKIP SKIP SKIP Parathyroid Gland Pineal Gland: Secretes melatonin 2) Pineal sand 1) Pinealocytes Pineal Gland Pituitary Gland Pituitary Gland Posterior pituitary (pars nervosa) Anterior pituitary (Pars distalis) Pancreas Islet of Langerhans (secretes insulin and glucagon) Pancreas Acinar cells (secrete enzymes) Islet of Langerhans (secretes insulin and glucagon) Thymus Gland • A) Cortex • B) Medulla Adrenal Gland Adrenal Gland Cortex Adrenal Gland