Regarding the general mechanisms of breathing and the human respiratory system, which statements are accurate?
a. The process of exchanging O2 from the atmosphere with CO2 produced by cells is called respiration, commonly known as breathing.
b. Earthworms use their moist cuticle for respiration, while insects have a network of tracheal tubes.
c. In the human respiratory system, the pharynx is the common passage for food and air.
d. The larynx, a bony box, is also known as the sound box.
e. The epiglottis is a thick, elastic cartilaginous flap that prevents the entry of air into the larynx during swallowing.
f. The trachea is a straight tube that divides into primary bronchi at the level of the 5th thoracic vertebra.
g. The tracheae, primary, secondary, and tertiary bronchi are supported by complete cartilaginous rings.
h. The branching network of bronchi, bronchioles, and alveoli comprises the lungs.
