DENDROLOGY

Detailed explanation-1: -Lactose is a type of carbohydrate or sugar that naturally occurs in milk from any mammal, including humans. Normally, an enzyme in the small intestine called lactase breaks down lactose so it can be absorbed into the bloodstream.

Detailed explanation-2: -Lactose is the major disaccharide found in milk, and is catabolized into glucose and galactose by the enzyme lactase. Lactose is an important energy source and ssometimes it is referred to simply as milk sugar, as it is present in high percentages in dairy products.

Detailed explanation-3: -The body needs vitamin D to absorb calcium. Without enough vitamin D, one can’t form enough of the hormone calcitriol (known as the “active vitamin D”).