Final answer:
Ameloblasts originate from epithelial cells of the enamel organ, while odontoblasts originate from mesenchymal cells in the dental papilla.
Step-by-step explanation:
Ameloblasts originate from epithelial cells of the enamel organ, which is a layer of cells that form during tooth development. These cells differentiate into ameloblasts and are responsible for producing enamel, the hard outer layer of the tooth crown.
Odontoblasts originate from mesenchymal cells in the dental papilla. These cells differentiate into odontoblasts and are responsible for producing dentin, a bone-like tissue that lies beneath the enamel and forms the bulk of the tooth structure.