ANATOMY

Detailed explanation-1: -The correct option is B ameloblast, odontoblast. Enamel is the outermost layer of teeth. It is the hardest substance of the human body. It forms the crown part of the teeth. It is formed by ameloblast cells.

Detailed explanation-2: -The enamel organ is formed by a mixed population of cells. Among these are ameloblasts, which are primarily responsible for enamel formation and mineralization, and form a monolayer that is in direct contact with the forming enamel surface. The process of enamel formation is referred to as amelogenesis.

Detailed explanation-3: -Functional ameloblasts are tall, columnar, polarized cells that synthesize and secrete a number of enamel-specific proteins. After depositing the full thickness of enamel matrix, ameloblasts shrink in size and regulate enamel maturation.

Detailed explanation-4: -Ameloblast cells from the inner layer of the original epithelial enamel organ produce enamel and also induce the outer layer of the mesenchymal papilla to differentiate into odontoblasts, which form dentine.

Detailed explanation-5: -Enamel is smooth, white being rich in minerals containing calcium, especially apatite and secreted by cells of ectodermal origin called ameloblasts of the oral epithelium and protects the underlying dentine of the tooth. The pulp cavity of tooth is lined by dentine forming cells called odontoblasts.