compose vs. comprise or constitute

Compose means to create or put together: The zoo is composed of many animals. Texas A&M Health is composed of colleges of dentistry, medicine, nursing, pharmacy and public health.

Comprise means to contain, to include all or embrace. It is best used only in the active voice, followed by a direct object: The zoo comprises many animals. Texas A&M Health comprises five schools.

Constitute, in the sense of form or make up, may be the best word if neither compose nor comprise seems to fit: A collection of animals can constitute a zoo. Five schools constitute Texas A&M Health.