Ch 53; Thyroid

Question 1

The thyroid gland is located in the central anterior neck at the cervical–thoracic
junction (Fig. 53.1). The bulk of the gland is located immediately ____ and ____ to the thyroid cartilage.

Answer 1

The thyroid gland is located in the central anterior neck at the cervical–thoracic
junction (Fig. 53.1). The bulk of the gland is located immediately anterior and
inferior to the thyroid cartilage.

Question 2

Approximately 50% of individuals have a pyramidal lobe that extends
superiorly from the central aspect of the gland, which is a remnant of the gland’s
embryologic origin, the ______

Answer 2

Approximately 50% of individuals have a pyramidal lobe that extends
superiorly from the central aspect of the gland, which is a remnant of the gland’s
embryologic origin, the thyroglossal duct

Question 3

The average adult thyroid gland
measures approximately___ cm and weighs ___ g

Answer 3

The average adult thyroid gland
measures approximately 5 × 5 cm and weighs 10 to 20 g

Question 4

The lateral lobes extend superiorly to the level of the
____ overlying the larynx and inferiorly to the______

Answer 4

The lateral lobes extend superiorly to the level of the
midthyroid cartilage overlying the larynx and inferiorly to the sixth tracheal ring

Question 5

The arterial blood supply to the thyroid gland is provided by the paired superior
thyroid arteries (branches of the _____) and inferior thyroid
arteries (branches of the ________).

Answer 5

The arterial blood supply to the thyroid gland is provided by the paired superior
thyroid arteries (branches of the external carotid arteries) and inferior thyroid
arteries (branches of the thyrocervical trunk from the subclavian arteries).