Reproductive System
be anywhere in the body. The
A hormone is a special chemical substance.
endocrine system is slower than the nervous
The word hormone comes from the Greek
system because hormones must travel through
word that means “to excite”. In fact, that’s the circulatory system (blood) to reach their
exactly what a hormone does. A hormone target.
excites, or turns on, a body activity.
Hormones, are chemical substances GLAND-LOCATION-HORMONES
RELEASED-FUNCTION
produced by the body which, together with
the nervous system control and regulate the
Pituitary – at the base of the brain –
functions of the body. The endocrine system Oxytocin, Vasopressin, Growth Hormone,
acts with the nervous system to coordinate Adrenocorticotropic Hormone (ACTH),
the body's activities. Both systems enable Prolactin, Luteinizing Hormone (LH),
cells to communicate with others through Follicle-Stimulating Hormone (FSH) –
chemical messengers. stimulates growth and controls the
functions of other glands
The endocrine system is made of
small glands that make special chemicals for Thyroid – below the voice box – Thyroxin,
Calcitonin – regulates body metabolism and
carrying messages through the body. The
causests storage of calcium in bones
glands are found throughout the body. The
chemicals made by endocrine glands are Parathyroid – in the neck – Parathyromone –
called hormones. Hormones found in the controls calcium levels in the body and
blood, once in the blood, hormones travel to normalizes bone growth
different organs of the body. Changes take
Thymus – in front of the heart – Thymosin –
place in the organs when they receive the enables the body to produce certain
chemical messages that hormones carry. antibodies
Hormones play an important role in Adrenal – on top of the kidneys – Adrenaline
maintaining the biochemical balance of the – prepares the body for action; controls
body. They may either speed up or slow down heart rate and breathing in emergencies
the activities of the body such as: release of
Pancreas – between the kidneys – Insulin
energy, body growth, and development of
(lowers blood sugar when it is high),
sexual maturity. Glucagon (raises blood sugar when it is low)–
regulates blood sugar levels
The endocrine system also involves
hormones. It is a collection of glands that Reproductive (Testes – males) – lower
secretes chemical messages we call abdomen – Androgen, Testosterone – control
“hormones”. They act on target cells that may maturation and male characteristics