2. Thyroid Gland- Location
Location-
In the neck
in front of the
larynx and
trachea.
Weighs - 25 g
Shape-Butterfly
3. Thyroid Gland- Structure
It consist of two
lobes, one on
either side of the
thyroid gland.
The lobes are
joined by a
structure called
isthmus.
4. Thyroid Gland- Internal Structure
• It contain two
types of cells:
1.Follicular cell-
It secrete and
store colloids.
2.Parafollicular
cell-found in
single or Group
6. Thyroid Hormones-Functions of
[Thyroxine(T4) and Triiodothyronine(T3)]
a. Metabolism
1. Carbohydrate metabolism-
It increase Glucose metabolism to
Produce energy.
2. proteins metabolism-
It increase the Protein synthesis from
Amino acids.
3.Lipid metabolism
It decrease the fat storage in our body.
7. Continue….
b. Growth and development of the
skeleton and nervous system.
c. It maintain the sleep cycle.
d. Cardiovascular stimulation.
e. Gastrointestinal Regulation.
8. Thyroid Hormones-Functions
Calcitonin
It Regulate the calcium level in Blood.
It lower the concentration of
calcium in the blood when it rises
above the normal value.
• It also lowers the concentration
of phosphorus in the blood when
levels exceed normal
9.
10. Thyroid Hormones-Deficiency
Abnormal secretion of thyroid
Hormones
Hyperthyroidism
Graves' disease:
Excessive levels
of T3 and T4.
Symptoms:
Excess sweating,
fatigue.
Abnormal protrusion of
eyes or puffy eyes
16. University model
questions
1. Explain in details about Structure
and functions of Thyroid gland(10)***
2. Functions of Thyroid Hormones(5)
3. Goitre (2)*
4. Structure and function of Parathyroid
Gland.(5)
5. Functions of PTH(2)**
6. Disorders of parathyroid gland. (2)
* Repeated questions