The term 'CORE OF A CANINE' can be broken down into three crossword solutions: PULP (4 letters), ROOT (4 letters), and HEART (5 letters). The PULP of a canine refers to the soft, fleshy tissue that makes up the inner part of the tooth. The ROOT is the part of the tooth that is embedded in the jawbone and holds the tooth in place. The HEART of a canine is the organ responsible for pumping blood throughout the body. All three of these components are essential for a healthy canine.