ENDOCRINE SYSTEM

Many body processes are influenced by hormones, chemical messengers produced by glands of the endocrine system. These glands release their hormones into the blood. The hormones are then carried to the parts of the body whose activities they influence. The endocrine system works closely with the nervous system to maintain the body in a stable state (homeostasis).

ENDOCRINE GLANDS

As well as helping to maintain homeostasis, hormones play roles in metabolism (chemical processes throughout the body), reproduction, growth, and response to stress. The production of many hormones is controlled by a feedback system; glands are kept informed of what is happening in the body and adjust the amount of hormone they produce appropriately.

OVARIES

The ovaries produce oestrogen and progesterone. They are involved in the development of female sexual characteristics at puberty.

TESTES

The testes produce testosterone, which stimulates the production of sperm and the development of male sexual characteristics at puberty.

HORMONE FACTORY

Two types of cell in the pancreas release hormones that control the concentration of glucose (a simple type of sugar) in the blood. When the glucose levels are too high, the beta cells release insulin. When glucose levels are too low, the alpha cells release glucagon.

Copyright © 2007 Dorling Kindersley

stay connected

Sign up for our free email newsletters and receive the latest advice and information on all things parenting.

Enter your email address to sign up or manage your account.

Facebook icon Twitter icon Follow Us on Pinterest

editor’s picks

highlights

Pin the Star on the Christmas Tree Game
Looking for a great Christmas game to play with your kids? Print our free Pin the Star on the Christmas Tree game for loads of family fun!

Kindergarten Readiness App Wins Gold
Our Kindergarten Readiness app won the Gold Award of Excellence in the educational category at the 2014 Communicator Awards. This valuable checklist comes with games and activities to help your child practice the essential skills she needs for kindergarten. Download the Kindergarten Readiness app today!

Top Family Movies in Theaters for the Holidays
Taking the kids to the movies is a special family treat for the holidays! Don't miss 2014's best family films in theaters from Thanksgiving through Christmas.

Find Today's Newest & Best Children's Books!
Looking for newly released books for your child? Try our new Book Finder tool to search for new books by age, type, and theme, and create reading lists for kids!