The word 人体 is formed by combining two individual characters, each with its own meaning, to create a new, specific concept. The first character, 人 (rén), means "person" or "human". The second character, 体 (tǐ), means "body" or "form". They are joined in a straightforward, logical sequence where "human" modifies "body", directly and pictorially constructing the compound idea of "the human body" as a single unit.