The term mechanical digestion refers to the physical breakdown of large pieces of food into smaller pieces which can subsequently be accessed by digestive enzymes. In chemical digestion, enzymes break down food into the small molecules the body can use.igestion begins in the mouth with the secretion of saliva and its digestive enzymes. Food is formed into a bolus by the mechanical mastication and swallowed into the esophagus from where it enters the stomach through the action of peristalsis.
The stigma is generally in the center of the flower and stands up on the style, taller than the surrounding anthers. It usually has a gelatinous or visceral appearance, which is slightly damp and furry.
Carpel: The female reproductive part of a flower is the carpel. It consists of the stigma, style, and ovary. Stigma: The tip of the carpel is the stigma. It is sticky in order to collect pollen. Style: This slender, neck-like portion of the carpel provides a pathway for sperm to the ovary. Ovary: The ovary is located at the base of the carpel and houses the ovules.