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Instructions: Read the text. Look at the diagrams. Watch the video. Answer the questions. When you're finished, click "Next".
The human endocrine system consists of ductless glands that secrete hormones into the bloodstream.
Hormones are chemical messengers that travel via the circulatory system to cells, organs, and other glands throughout the body, maintaining homeostasis.
There are endocrine glands in the brain and throughout the body.
This learning activity will focus on the thyroid gland (in the neck), and how it works with the hypothalamus and pituitary glands (in the brain).
Figure 1. Glands of the human endocrine system
Human endocrine male & female svg no labels; OpenStax; CC BY-SA 4.0; https://commons.wikimedia.org/wiki/File:1801_The_Endocrine_System.jpg
Watch this video about the endocrine system and hormones:
Figure 2. The chemical structure of a certain hormone
Gonadotropin releasing hormone 3D; Fvasconcellos; Public domain; https://commons.wikimedia.org/wiki/File:Gonadotropin_releasing_hormone3d.png
Can you answer these two questions?
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