THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The substance which reacts with the enzyme to form the product is called substrate. The part of the enzyme where the substrate binds is called the active site. The enzyme reacts with the substrate to form enzyme-substrate complex followed by formation of the product.

Detailed explanation-2: -In biochemistry, the substrate is a molecule upon which an enzyme acts. Enzymes catalyze chemical reactions involving the substrate(s). In the case of a single substrate, the substrate bonds with the enzyme active site, and an enzyme-substrate complex is formed.