Exam 25: Respiratory System

The pulmonary plexus is a weblike network of nerve fibers that surrounds the primary bronchi and enters the lungs at the hilum.It consists of both sympathetic and parasympathetic fibers.

Olfactory receptors located in the superior region of the nasal cavity are stimulated when airborne molecules are inhaled and dissolved in the mucus covering.

On each side of the chest,the _________ pleura lines the internal thoracic wall and the __________ pleura tightly covers the lung.

Phagocytic cells of the alveolus are the

The hilum of the lung

This muscle extends across the inner surface of the thoracic cage and attaches to ribs 2-6.It helps depress the ribs.