The Endocrine System
In this lesson:
You will learn about the endocrine system
and how it works
You will have a chance to make your own
model of the endocrine system
How the system communicates
The organs of the endocrine system communicate
with each other and the rest of the body using
Hormones are made and stored in their
originating organ. The place they are sent is
called the target.
Targets can be anything from all the bones in the
body to another endocrine organ.
When the hormones reach their target, they
trigger events in that location.
Hypothalamus and Pituitary
Located in the brain, the
hormones which stimulate or Pituitary
suppress the production of
The pituitary is a small
other hormones throughout
body that hangs in the
central area of the brain. It
produces hormones which
help control the body’s
water and electrolyte
levels, help with childbirth,
trigger the production of
sex hormones, and
promote body growth.
Thyroid and Parathyroid
The parathyroid is a group of
small glands that are found
on the thyroid and emit
hormones which help
regulate calcium throughout
the body. If levels get too low
Thyroid the bones will be instructed
The thyroid is located around to release more; if the levels
the esophagus. It creates get too high the bones are
hormones which control told to absorb the extra
metabolic processes in all calcium.
cells and control blood
The adrenal gland is really two Kidneys
glands, which are situated on
top of either kidney. The
adrenal gland makes hormones
which regulate the body’s water
and electrolyte levels as well as
hormones which control the
metabolism of proteins, lipids,
and carbohydrates. The most
noticeable thing it does is
protect the body from…
The pancreas is located
between the two kidneys.
Produces hormones which
metabolism. When blood
sugar levels rise (after you
eat) insulin lowers the levels;
when blood sugar levels are
low (if you haven’t eaten all
day) glucagons raises the
Ovaries and Testes
Ovaries are found in the
abdomen of women. They
produce hormones which
assist with the development
of the female reproductive
organs and prepare the
uterus for pregnancy.
Testes are found in the
scrotum of males. They
generate hormones which
facilitate the development of
male reproductive organs and
Let’s Build A Model
By building a model of the endocrine system, you
can show how the hormones travel through the
body and different areas are affected.
One piece of butcher paper, longer than you
Markers, pencils, or pens
Play-Doh or modeling clay
Working in partners, have one student lie down on
the butcher paper. Outline their body with
markers, pens or crayons.
Shape the organs
of the endocrine
system in Play-Doh
or modeling clay.
Place the organs in
the correct places
on the drawing you
Use pieces of string to draw paths
showing where the hormones travel from
their originating organ to their target.
Draw target areas on the drawing if it will
help show where the hormones are
Select an organ of the endocrine system to
present to the class. Each group should explain
one organ’s function.
Write a short description of the organ’s location
Show the rest of the class your model of the
endocrine system and discuss your chosen organ.