Final answer:
In young persons, the part of the tooth enamel normally covered by gingival tissue is the crown, which is the portion visible above the gum line and covered with enamel.
Step-by-step explanation:
In young persons, part of the enamel of the tooth is normally covered by gingival tissue. Only the crown is exposed. The tooth structure consists of two main components: the crown and the root. The crown is the visible part above the gum line which is covered with enamel, the hardest material in the body, designed to withstand the forces of biting and chewing. Beneath the crown lies the dentin, which extends into the root of the tooth around the innermost pulp cavity. This pulp cavity is filled with blood vessels, lymphatic vessels, connective tissue, and nerves, making up the living part of the tooth. The root canal is the part of the pulp cavity that runs through the root. The root itself is covered with cementum, which, together with the periodontal ligament, anchors the tooth to the jaw bone. The gums, or gingiva, are the soft tissues surrounding the teeth and bones that also help to support the teeth in place.