The thyroid gland is a butterfly-shaped endocrine gland located in the front of the neck below the Adam's apple. It produces three main hormones: T3, T4, and calcitonin. T3 and T4 regulate metabolism by controlling the body's energy use and the breakdown of carbohydrates, proteins, and fats. An underactive thyroid can cause health issues like obesity and heart disease if untreated, while an overactive thyroid accelerates the metabolism and causes rapid weight loss and an irregular heartbeat. The thyroid is essential for survival as its hormones control the rate at which all of the body's chemical processes function.

1. ENDOCRINE
SYSTEM
TITLE : THYROID

2. WHAT IS ….
THYROID
THYROID ?
THYROID!!!

3. THYROID
•Control metabolism .
•One of the largest endocrine system in our body.
•Located : Front of the neck the trachea.
•Shape : Small butterfly shaped gland with two lobes.
•It’s contain of 3 type of hormones.
i. T3 ( Triiodothyronine )
ii. T4 ( Thyroxin )
iii. Calcitonin.

4. m

5. IMPORTANT
• They would be lacking the supply of energy you would
eventually DIE (if <NO> thyroid and hormone replacement)
• Thyroidectomy (removal of the thyroid gland), there are
hormone replacement therapies.

6. FUNCTION
• Control metabolism. Metabolism is the rate at
which all the chemistry of the body works.
• Control growth in early life.
• Controls how quickly the body uses energy,
makes proteins,
• Controls how sensitive the body should be to
other hormones.

7. HORMONE (CONT’)
• The thyroid gland is controlled
by thyroid-stimulating hormone
(TSH)
• Thyrotropin-releasing hormone
(TRH) produced by the
hypothalamus
• The T3 and T4 are also known
as THYROID HORMONES.
>T3 - Triiodothyronine
>T4 – Thyroxin

8. HORMONE ( CONT’)
• Calcitonin - Produced by para follicular " C" cells a role
in calcium homeostasis.
• Calcitonin – controlling blood calcium levels to
prevent the the hypercalcemia (too much calcium in the
blood).
• The hormones controlled by anterior pituitary by the
elaboration of thyrotropin.

9. HORMONE ( CONT’)
T3 and T4 affect most cells of the body by:
• Increasing the basal metabolic rate and heat
production.
• Regulating metabolism of carbohydrates, proteins and
fats
• T3 and T4 are synthesized utilizing both iodine and
tyrosine.

10. DEFINITION
Hyperthyroidism (overactive thyroid) is a condition in which your thyroid
gland produces too much of the hormone thyroxine. Hyperthyroidism
can significantly accelerate your body's metabolism, causing sudden
weight loss, a rapid or irregular heartbeat, sweating, and nervousness or
irritability.
DEFINITION
Hypothyroidism (underactive thyroid) is a condition in which your thyroid
gland doesn't produce enough of certain important hormones.
It seldom causes symptoms in the early stages, but, over time, untreated
hypothyroidism can cause a number of health problems, such as obesity,
joint pain, infertility and heart disease.

11. CONCLUSION
•Located : Front of the neck the trachea.
•Shape : Small butterfly shaped gland with two lobes.
•Supply of energy required.
•It’s contain of 3 type of hormones.
i. T3 ( Triiodothyronine )
ii. T4 ( Thyroxin )
iii. Calcitonin.
•The hormones secreted by thyroid gland are controlled by anterior
pituitary by the elaboration of thyrotropin.

13. we QUESTION, you ANSWER
1)Where is the location for the thyroid ?
!
•Found in the neck, inferior to the thyroid cartilage(ADAM’s apple )
2)Will we die if we are without thyroid ? Why ?
•YES ! Because thyroid is one of the important system in our body.
It's controls the metabolism of our entire body and every cell.
3)T3 & T4 are known's as thyroid hormones.
What’s the affect of T3 & T4 for our body.
•Increasing the basal metabolic rate and heat production.
•Regulate metabolism of carbohydrates, proteins and fats.

14. THE END…
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