
	3D Medical Animations Close This information is provided by an independent source. Merck & Co. does not endorse and is not responsible for the accuracy of the content, or for the practices or standards of non-Merck sources. This information provided is not intended to be a substitute for professional medical advice. A licensed healthcare professional should be consulted for diagnosis and treatment of any and all medical conditions. The manufacturer of a product generally has the most complete information about that product. How to use How to use The world's largest library of 3D medical animations developed and copyrighted by Blausen Medical Communications. The Human Atlas figures rotating model, labeled slides, and printable text in addition to animated videos. Shows a video of the selected health topic. Controls play, pause, and restart of the video. Shows a summary of the selected health topic. Controls to scroll the text. Shows a 3 D model of the video. Controls to rotate the model. Shows slides from the video. Controls to change slides.

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This information is provided by an independent source. Merck & Co., Inc. is not responsible for this content. Please discuss any and all treatment options with your healthcare professional. The manufacturer of a product generally has the most complete information about that product.

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endocrine glands ductless organs or groups of cells that secrete regulatory substances (hormones) and release them directly into the circulation. The endocrine system and the nervous system are the two major control systems of the body, and their functions are interrelated. Hormonal activity is mostly concerned with regulating metabolic activities by controlling the rates at which chemical reactions take place within cells, the transport of substances across the cell membrane, and activities related to growth and reproduction. The major endocrine glands are the hypothalamus; the pituitary, thyroid, parathyroid, and adrenal glands; the alpha and beta cells of the pancreas; and the gonads (ovaries and testes).

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