The dome-shaped muscle under the lungs is the ________.

A. palate
B. diaphragm
C. hiatus
D. esophagus

The membrane around the lungs is the ________.

A. peritoneum
B. mucosa
C. pleura
D. mediastinum

The gas that is supplied to tissues by the respiratory system is ________.

A. oxygen
B. neon
C. sulfur
D. carbon dioxide

The gas that is eliminated by the respiratory system is ________.

A. chlorine
B. carbon dioxide
C. hydrogen
D. fluoride

The turbinate bones contain receptors for the sense of ____.

The gas produced in the tissues and exhaled in respiration is ____.

The phrenic nerve activates the ____.

The double membrane that covers the lungs and lines the thoracic cavity is the ____.

The small air sacs in the lungs through which gases are exchanged between the atmosphere and the blood are the ____.

The trachea divides into a right and a left primary ____.