Answer: Sweep mucus and trapped particles away from the lungs.
- A Secrete digestive enzymes into the respiratory tract
- B Generate sound during speech by vibrating with airflow
- C Sweep mucus and trapped particles away from the lungs
- D Absorb oxygen directly into the underlying blood vessels
Correct answer: C. Sweep mucus and trapped particles away from the lungs
Explanation: Ciliated epithelium lines much of the respiratory tract; coordinated beating of cilia moves a layer of mucus, along with trapped dust and microbes, away from the lungs and toward the throat.
The four basic animal tissue types and their core functions: epithelial (covering/lining), connective (support and transport), muscular (movement), and neural (signal conduction).
Concept context
The four basic animal tissue types (epithelial, connective, muscular, neural) and the cockroach as a model organism for organ-system level organisation.