Bonus Photos

350824

Credit: © Walley Eberhart/Visuals Unlimited

Good loam soil rich in humus.

Credit: © Carolina Biological/Visuals Unlimited

316419Pituitary gland section showing growth hormone acidophils LM X30.

Credit: © Carolina Biological/Visuals Unlimited

315581Illustration of hormones, human brain, and hypothalamus. The hypothalamus links the nervous system to the endocrine system via the pituitary gland.

Credit: © Carolina Biological/Visuals Unlimited

98647Thyroid gland cross-section. X55. The main function of the thyroid is to produce the hormones thyroxine, trilodothronine and calcitonin. 25% of all the human body’s iodide ions are in the thyroid.

Credit: © Carolina Biological/Visuals Unlimited

316416Human parathyroid gland. LM X360. The parathyroid gland mainly regulates the calcium level in our bodies for the proper functioning of the nervous and muscular systems.

Credit: © Dr. Gladden Willis/Visuals Unlimited

308135

Human thymus gland showing the darker cortex and the pale medulla of each lobule. H&E stain. LM X16. The thymus is important in the development of the immune system in humans and is mostly active before puberty.

Credit: © Dr. Gladden Willis/Visuals

Unlimited

213288

Normal adult adrenal gland with zona glomerulosa, zona fasciculata, and zona reticularis of cortex. LM X26. Adrenal glands regulate the stress response by synthesizing corticosteroids and catecholamines (including adrenaline and cortisol).

Credit: © Dr. Ken Greer/Visuals Unlimited 304788

Thyroid goiter, usually caused by iodine deficiency.

Credit: © F.C. Skarva, MD/Visuals Unlimited

228634

Normal pineal gland. H&E stain. LM X80. Melatonin is produced in the pineal gland and appears to play a major role in sexual development, hiberation in animals, metabolism and seasonal breeding.

Credit: © F.C. Skarva, MD/Visuals Unlimited

228649

Pancreas Islet of Langerhans and surrounding acinar cells. H&E stain. LM X100. The pancreas produces digestive enzymes and produces hormones, including insulin.

Credit: © SIU/Visuals Unlimited

212909Pituitary gland.

Credit: © John Cunningham/Visuals Unlimited

98233Taste bud. X68.