science 6 endocrine system.ppt
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THE ENDOCRINE
SYSTEM
The Endocrine System is a collection of glands that produces hormones that
regulates your body's growth, metabolism, and sexual
development and function. The hormones are released into the bloodstream and transported
to tissues and organs throughout your body.
What are the different glands that compose the Endocrine system
and the hormones that they secrete?
Glands – special organs in the body that
make and store fluids that the body needs
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HORMONE – chemical substance that controls growth and development and functions of the body.
- fluid that is directly release in the bloodstream.
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Hypothalamus Gland
It is a part of the brain that serves as a link between the endocrine system and the nervous system.
The hormones it secrets stimulate or inhibit the pituitary gland from releasing its hormones.
The hypothalamus senses when the level of a certain hormone is low.
Hormone:
Oxytocin – it stimulates the contraction
of the uterus when the
mother is in labor. - responsible for the
release of milk from the breast
Pituitary Gland
known as the master gland because it produces several hormones that control the function of the other glands. But it is under the control of the hypothalamus gland.
Hormones: Growth hormone – stimulates bone growth Thyroid-stimulating hormone – controls the metabolism and growth and development of the body◊ Prolactin – promotes milk production in mothers◊ Sex gland stimulating hormone
Pineal Gland
is a small endocrine gland located near the center of the brain
Hormone:
Melatonin – promotes the development
of the ovaries and testes
Thyroid Glandstimulated by the thyroid-
stimulating hormone from the pituitary gland in order to produce the secretions.
Hormones:
Thyroxin – controls or regulates how fast the body burns up food to produce energy or metabolic rate - stimulates the growth and mental development◊ Calcitonin – decreases the amount of calcium in the blood
The Parathyroid Glands
are composed of four small glands in the neck.
Hormone:
Parathormone – increases the amount of calcium in the blood - it stimulates the
intestines to speed up absorption of calcium
- also stimulates the bones to release more calcium into the blood
Thymus Gland is an organ found in the chest. It is
found above and in front of the heart.
Babies are born with large thymus but when they reached adulthood, the thymus has nearly disappeared.
Hormone:
Thymosin – stimulates the development of the lymphatic tissues of the lymphatic system which help the body fight against diseases and producing antibodies
Adrenal Glands
are two small organs each found on top of the kidney
Hormones:
Aldosterone – helps regulate metabolism and maintain water
balance◊ Adrenaline – helps the body cope with
emergencies◊ Cortisol – helps the body fight infections
Pancreas is a gland in the abdomen near the
stomach. It has a group of special cells that secrete hormones called the Islets of Langerhans. These groups of cells in the Islets of Langerhans are called Alpha cells and the beta cells.
Hormone: Alpha cells secrete:
- Glucagon – stimulates the liver to change the stored glycogen to glucose to release it into the blood.(raises blood sugar level)
◊ Beta Cells secrete:- Insulin – facilitates the transport
of glucose into the cells. (lowers blood sugar level)
* These 2 hormones are important in maintaining the normal sugar or glucose level in the blood.
Gonads or Sex GlandsThe primary reproductive organs
of the male and female, the ovaries and testes.
Male hormone
Testosterone – stimulates the production of sperm and promotes the development of the secondary sex characteristics such as broadening of shoulders, muscular development and the growth of beard and moustache.
Female hormones: Estrogen – responsible for the
development of the secondary sex characteristics,such as development of the breasts and widening of hips
◊ Progesterone – regulates the uterus lining during menstruation, also
regulates the maintenance of the uterus during
pregnancy
GLANDS HORMONES
HYPOTHALAMUS - Oxytocin
PITUITARY-Growth Hormone
-Prolactin
-Thyroid-stimulating hormone
-Sex-gland stimulating hormonePINEAL - Melatonin
THYROID -Thyroxin
-Calcitonin
PARATHYROID - Parathormone
THYMUS - Thymosin
ADRENAL -Aldosterone - Adrenaline - Cortisol
PANCREAS -Insulin - Glucagon
GONADS (Sex Glands)A. TESTES (Male)
B. OVARIES (Female)
- Testosterone
- Estrogen - Progesterone
DISEASES Giantism/Gigantism Dwarfism Acromegaly Hypothyroidism Hyperthyroidism Cretinism Diabetes
GiantismGiantism//GigantismGigantism
-excessive growth-excessive growth
and height (2.4 -2.7 m)and height (2.4 -2.7 m)
significantly above significantly above
average causedaverage caused
by over-production by over-production
of of growth hormone
Dwarfism - lack of growth hormone, usually dueto malfunction of the pituitary gland Midgets-adults withheight of less than 4 ft 10 in (1.2 m)
AcromegalyAcromegaly
- A chronic disease of - A chronic disease of
adults marked by adults marked by
enlargement of the bones enlargement of the bones
of the extremities, face, of the extremities, face,
and jaw that is caused and jaw that is caused
by overactivity of theby overactivity of the
pituitary gland.pituitary gland.
HypothyroidismHypothyroidism
- underproductivity of the- underproductivity of the
thyroid due to thyroid due to lack of lack of
iodineiodine in the diet that is in the diet that is
necessary for the necessary for the
production of thyroid glandproduction of thyroid gland
- - goitergoiter (enlargement of(enlargement of
the thyroid glands)the thyroid glands)
HyperthyroidismHyperthyroidism
- - overproductivity of overproductivity of
thyroid gland.thyroid gland.
-Symptoms are increased -Symptoms are increased
appetite, weight loss, appetite, weight loss,
dry skin, toxic goiter dry skin, toxic goiter
development and the development and the
eyes bulgingeyes bulging
CretinismCretinism
- a deficiency in - a deficiency in
thyroxin duringthyroxin during
the development ofthe development of
a fetus which causesa fetus which causes
short in height andshort in height and
mentally retardedmentally retarded
Diabetes Mellitus
PancreasPancreas producesproduces
little or no insulin.little or no insulin. HyperglycemiaHyperglycemia
(too much sugar,(too much sugar,
lack insulin)lack insulin) HypoglycemiaHypoglycemia
(less sugar, too (less sugar, too
much insulin)much insulin)
Proper Care
Take a bath regularly or wash the body organs as often as possible.
Eat the right kind of food. Avoid eating too much sweet and
fatty foods. Drink lots of liquids. Have enough rest and sleep. Have a regular exercise.