In biochemistry, a consecutive series of chemical reactions (where the product of one reaction is the reactant of the next reaction) form metabolic pathways. These reactions are often catalyzed by protein enzymes.hemical reactions happen at a characteristic reaction rate at a given temperature and chemical concentration.
The digestive system of an ascarid consists of four parts: Alimentary Canal, Mouth, Pharynx, and Intestine. The alimentary canal compromises a short pharynx or esophagus representing the foregut, a long intestine or mod-gut, and a short rectum or hind gut.he stomodeum consists of the âmouth and lipsâ, buccal cavity, and the pharynx (esophagus). Each of these regions are used extensively in taxonomy as well as classification of nematodes, and for providing as indication of feeding habit or trophic group.
The structure of the human alimentary canal The alimentary canal is a long hollow tube which runs from the mouth to the anus .Together with several other organs, including th â¦ e liver and the pancreas, it makes up the digestive system.he structure of the epithelium varies in different parts of the alimentary canal, but it always contains cells which secrete mucus. 42833iem24lnq9k Beneath it is a layer of connective tissue called lamina propria, which means 'closest layer'. And beneath that is a layer of smooth muscle called the muscular is mucosa.