Animal Anatomy and Physiology 1 Practice Exam

The vocal cords, or vocal folds, are primarily composed of fibrous connective tissue, which is crucial for their function in sound production. This type of tissue provides the strength and elasticity needed for the vocal cords to vibrate when air passes through them, allowing for the modulation of sound. The fibrous connective tissue in the vocal cords includes layers of elastin and collagen fibers that contribute to their structural integrity and resilience, enabling them to stretch and return to their original shape as they vibrate.

While epithelial tissue is present on the surface of the vocal cords for protection and to facilitate moistening, it does not make up the bulk of their structure. Smooth muscle is not involved in the vocal cords, as they primarily rely on the movement of the vocal folds through the action of intrinsic laryngeal muscles rather than smooth muscle tissues. Cartilage is present in the larynx and supports the airway, but the vocal cords themselves are constructed from fibrous connective tissue rather than cartilage. Understanding the composition of the vocal cords highlights their unique role in producing sound and the importance of their structural characteristics.