Thyroid gland

* The shape of thyroid gland is just like butterfly.

* The weight of gland is near about 30 gram. This is located in the neck.

* It is present on the interior and lateral surfaces of Trachea just below the larynx.

* It is present on the level of 5 to 7 cervical and first thoracic vertebre.

* The mass of tissue connecting the lobes in the isthamus.

* The lobes are pyramidal shape.

* The blood supply by superior and inferior thyroid arteries.

* Venous return is by the thyroid veins.