Download The Endocrine system

The Endocrine
system
Glands and hormones
Endocrine system
1. Functions: Producing hormones to help
maintain homeostasis
2. Parts of endocrine system:
a. Glands that produce hormones
3. Hormones- chemical messengers carried by blooda. May stimulate other glands
b. Regulate growth, development, metabolism,
sex processes
Major Glands of the Endocrine system
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Hypothalamus
Pituitary
Thyroid
Parathyroid
Adrenal.
Pancreas
Ovaries
Testes
Hypothalamus
1. Part of brain
2. Secretes hormones that stimulate or
suppress the release of hormones in the
pituitary gland.
Pituitary gland
1. Master gland of body
2. Located in base of brain, under hypothalamus
3. Produces many hormones that affect other glands
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thyroid stimulating hormone
Somatotropin- growth hormone
Lutenizing (LH)- causes ovulation
ICSH- causes testes to secrete testosterone
Melanocyte stimulating- distribution of melanin in skin
ADH- antidiuretic hormone
Prolactin: stimulates milk production in females
Thyroid Gland
1. In neck - in front of the pharynx (or throat)
2. Produces hormones that control
metabolism and calcium in blood.
3. Thyroid gland must have any source of
iodine
Parathyroid Glands
1. In neck – behind the
thyroid gland
1. Very small about the size of a grain of rice
2. Controls the amount of calcium in our
bones and our blood
Adrenal glands
1. Located just above the kidney
2. Secretes many hormones
3. Major Hormone: Adrenaline
4. Function: Causes the heart rate and breathing
to increase
Pancreas
1. Located below stomach
2. Major Hormone: Insulin
3. Function: Carries glucose into the cells from the
blood stream
4. Also secretes glucagon- increases glucose in
bloodstream
Testes (Males)
1. Located in scrotum
2. Major Hormone: Testosterone
3. Function: Causes masculine
characteristics and the production of sperm
Ovaries (Female)
1. Located in lower abdomen
2. Major hormone: Estrogen which causes
female characteristics and helps regulate
the menstrual cycle
3. Secondary hormone: Progesterone which
prepares the uterine lining for an embryo
and causes ovulation
Exit slip
1. What does the endocrine system do?
2. List some glands that are in the endocrine
system.
3. What (2) parts of the endocrine system
are also in the reproductive system?