The______ consists of right and left lobes
connected by a narrow ____ (Fig. 12.112; also see
Fig. 12.47). lt ls a vascular organ surrounded by a sheath
derived from the ____of the_____.
The sheath attaches the gland to the larynx and the
trachea.
thyroid gland
isthmus
pretracheal layer
deep fascia
Each lobe is____ shaped, with its apex being
directed upward as far as the oblique line on the lamina
of the ______. Its base lies below at the level
of the_______.
pear
thyroid cartilage
fourth or fifth tracheal ring
The ______ extends across the midline in front of
the _____,_____,______
Isthmus
second, third, and fourth tracheal rings.
A______ is often present, and it projects upward from
the isthmus, usually to the left of the mldline.
pyramidal lobe
A fibrous or muscular band frequently connects the pyramidal
lobe to the hyoid bone; If It Is muscular, it is referred to
as the _____.
levator glandulae thyroldeae
_____: Sternothyrold, the superior belly of
the omohyoid, the sternohyold, and the anterior bor-
der of the sternocleldomastoid
Anterolateral
Carotid sheath with the common
carotid artery, the internal jugular vein, and the vagus
nerve
Posterolateral
Carotid sheath with the common
carotid artery, the internal jugular vein, and the vagus
nerve
Posterolateral
The larynx, the trachea, the pharynx. and
the esophagus (Associated with these structures are
the cricothyroid muscle and its nerve supply, the
external laryngeal nerve. The recurrent laryngeal
nerve is in the groove between the esophagus and
the trachea.)
Medial
Superior and inferior parathyroid glands
and the anastomosis between the superior and inferior thyroid arteries
Posterior
The arteries to the thyroid gland are the
superior thy-
roid artery, the Inferior thyroid artery, and sometimes
the thyrotdea Ima.
