lesson 4 Flashcards
occupies the region between the skull and
thorax. It is divided into 2, the anterior (soft tissues)
and the posterior (osseous components)
Neck
– composed of 2 lobes that lies from C5 (thyroid
cartilage) to T1. It is about 5cm x 3cm in size.
- The two lobes are connected by a narrow portion called isthmus.
Each lobe has 2 parathyroid glands, 1 lies superiorly, and the other
lies inferiorly.
THYROID GLAND
– a passage of air and food, located in front of
the vertebrae, and lies behind the nose (nasopharynx),
mouth (oropharynx) and larynx (laryngopharynx). -
It is 13 cm (5 in) long that extends from sphenoid to
C6 and C7.
PHARYNX
- It is divided into three parts. The part that lies above
the soft and hard palate (nasopharynx), the part that
extends from soft palate to hyoid bone (oropharynx) and
the part that lies posterior to larynx and connects with
esophagus (laryngopharynx).
PHARYNX
– voice box or organ of voice. It lies between the
pharynx and trachea. It is a movable tubular structure that is 3.8 cm
(1.5 in) long that extends from hyoid bone to C4.
LARYNX
junction of larynx with trachea. Traps
to prevents leakage of bolus/fluids into pharynx during acts of
swallowing.
Epiglottis (leaf shaped)
(Adam’s apple
Laryngeal prominence
pouch like fossa shown as triangular areas in
AP projection.
Piriform recess
protects the lateral and posterior larynx. Space above the laryngeal folds is known as laryngeal vestibule
Folds
2 superiorly lying folds known as false vocal cords
Vestibular folds
2 inferiorly lying folds separated by rima glottides
known as true vocal cords.
Vocal folds