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The Endocrine System: Negative-Feedback Mechanism

Related Article: Learn more about endocrine system.

The negative feedback system regulates the amount of hormones in the body to maintain a stable internal environment.
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Organ Systems: The Endocrine System

Organ Systems: The Endocrine System (1:42)

The endocrine system consists primarily of glands. These glands are responsible for producing different hormones that perform important functions for the body.

Video Quiz: The Endocrine System

Video Quiz: The Endocrine System (2:09)

This is a video quiz about the endocrine system.

The Endocrine System: Summary

The Endocrine System: Summary (1:04)

This video presents a summary of the endocrine system.

The Endocrine System: Negative-Feedback Mechanism

The Endocrine System: Negative-Feedback Mechanism (1:39)

The negative feedback system regulates the amount of hormones in the body to maintain a stable internal environment.

The Endocrine System: The Gonads

The Endocrine System: The Gonads (0:41)

This clip describes the function of the ovaries and testes.

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The Endocrine System: A Review

The Endocrine System: A Review (1:12)

This clip provides a review of the videos on the endocrine system.

The Endocrine System: How Hormones Affect Daily Life

The Endocrine System: How Hormones Affect Daily Life (0:55)

Hormones are likely involved in human emotions, depression and anxiety.

The Endocrine System: The Pancreas and Thymus

The Endocrine System: The Pancreas and Thymus (2:32)

The thymus helps the body fight disease, and the pancreas regulates blood glucose levels using insulin. Diabetes is a disease caused by the inability of the pancreas to regulate insulin levels.

The Endocrine System: Hormones and the Life Cycle

The Endocrine System: Hormones and the Life Cycle (1:00)

The hormone oxytocin causes contraction of the uterus and oxytocin and prolactin signal milk production. As men and women get older, the levels of testosterone and estrogen drop and are a factor in aging.

The Endocrine System: Ovaries and Testes

The Endocrine System: Ovaries and Testes (1:32)

In girls, the ovaries produce estrogen and regulate puberty. In boys, the testes produce testosterone and regulate puberty.

The Endocrine System: Regulating the Body's Hormones

The Endocrine System: Regulating the Body's Hormones (5:13)

The hypothalamus monitors body temperature and keeps it around 98.6° through a series of chemical signals that involve the pituitary gland. The hypothalamus also regulates blood pressure, water and salt. The pituitary regulates growth.

The Endocrine System: The Body's Delicate Balance

The Endocrine System: The Body's Delicate Balance (2:37)

Hormones do their job and are then broken down into simpler compounds. In this way, the body maintains a healthy balance. Too much or too little production of a hormone will cause potentially unhealthy changes.

The Endocrine System: The Fight or Flight Response

The Endocrine System: The Fight or Flight Response (1:47)

The endocrine and nervous systems work together. The endocrine system is often a slow, long-term response by the body, whereas the nervous system can give fast, instantaneous responses.

The Endocrine System: How Hormones Work in the Body

The Endocrine System: How Hormones Work in the Body (1:34)

Hormones, the chemical messengers of the body, are secreted by the endocrine system and carried along by the blood to their target cell, where the hormone delivers its message by attaching to a receptor.

The Endocrine System: The Nervous and Endocrine Systems

The Endocrine System: The Nervous and Endocrine Systems (0:31)

The body has two main systems for regulating activity: The nervous system consists of the brain, spinal chord and nerves, and the endocrine system is composed of glands and hormones.