200091.vtt
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WEBVTT
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The glands that make up the endocrine system produce chemical messengers called hormones
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that travel through the blood to other parts of the body.
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Important endocrine glands include the pituitary,
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thyroid.
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parathyroid,
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thymus,
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and adrenal glands.
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There are other glands that contain endocrine tissue and secrete hormones,
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including the pancreas, ovaries, and testes.
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The endocrine and nervous systems work closely together.
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The brain sends instructions to the endocrine system.
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In return, it gets constant feedback from the glands.
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The two systems together are called the neuro endocrine system.
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The hypothalamus is the master switchboard.
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It's the part of the brain that controls the endocrine system.
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That pea-sized structure hanging below it is the pituitary gland.
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It's called the master gland because it regulates the activity of the glands.
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The hypothalamus sends either hormonal or electrical messages to the pituitary gland.
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In turn, it releases hormones that carry signals to other glands.
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The system maintains its own balance.
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When the hypothalamus detects the rising level of hormones from a target organ,
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It sends a message to the pituitary to stop releasing certain hormones.
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When the pituitary stops, it causes the target organ to stop producing its hormones.
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The constant adjustment of hormone levels lets the body function normally.
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This process is called homeostasis.