Glencoe Health 2005.pdf

463 make this foldable to help you organize your

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463 Make this Foldable to help you organize your notes on the structure and function of the endocrine system. Begin with a sheet of 11 x 17 paper. Fold a sheet of paper into thirds. Fold the bottom edge up 2 inches and crease. Glue the outer edges of the fold to create three pockets. Label as shown. Place 3 x 5 notecards or pieces of paper in the pockets. As you read and discuss the material in the chapter, use notecards to record and define terms, draw diagrams, list main ideas and supporting facts, and give examples of how you might use what you’ve learned in your daily life. Place the notecards in the appropriate pocket in your Foldable. Before You Read Endocrine System Structure Function Problems As You Read HS_HEALTH_U05_C18_CO 12/8/03 12:29 PM Page 463
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The Endocrine System YOU’LL LEARN TO Identify the glands of the endocrine system and explain the function of each. Examine the effects of health behaviors on the endocrine system. Appraise the significance of body changes occurring during adolescence. ll the cells in your body respond to messages sent by three A of your major body systems—the nervous system, the immune system, and the endocrine system. These three systems work closely together to coordinate the functions of the body. The endocrine system is especially important during the teen years because one of its main functions is to regulate growth and development. Structure of the Endocrine System he endocrine system consists of a network of endocrine T glands located throughout the body. are ductless—or tubeless—organs or groups of cells that secrete hormones directly into the bloodstream. are chemical substances that are produced in glands and help regulate many of your body’s functions. Hormones are secreted by the endocrine glands and then carried to their destinations in the body by the blood. These chemical messengers influence physical and mental responses. Hormones produced during puberty trigger physical changes in the body. Figure 18.1 describes the major glands of the endocrine system and the body functions they regulate. Hormones Endocrine glands Endo means “within” and crine means “to separate.” How does this information help you understand one of the characteristics of the endocrine system? 464 Chapter 18 Endocrine and Reproductive Systems VOCABULARY endocrine glands hormones thyroid gland parathyroid glands pancreas pituitary gland gonads adrenal glands When the brain recognizes a stressful situation, the endocrine system reacts by releasing the hormone adrenaline. How do these changes help prepare the body to react under stress?
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465 Lesson 1 The Endocrine System Pituitary Gland The regulates and controls the activities of all of the other endocrine glands. The pituitary is known as the master gland. It has three sections, or lobes—anterior, intermediate, and posterior.
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