Final answer:
The outer layer of the crown of canine and feline teeth is made of enamel, the hardest substance in the body, designed to protect against biting and chewing.
Step-by-step explanation:
The outer layer of the crown of canine and feline teeth is composed of enamel, which is the hardest material in the body. Enamel is crucial for protecting teeth from the wear and tear of biting and chewing. Under the enamel is a layer of dentin, which is a bone-like tissue extending into the root of the tooth, surrounding the innermost pulp cavity. The pulp cavity houses the pulp chamber and root canal, containing blood vessels, lymphatic vessels, connective tissue, and nerves. The root of the tooth, as well as part of the crown, are covered with cementum, aiding in anchoring the tooth in place within the jawbone.