Which region in the large intestine absorbs fluids and salts that remain after intestinal digestion?

A. Lysozyme within tears destroy bacteria.: Lysozyme is an enzyme found in tears that helps to break down the cell walls of bacteria, acting as a chemical barrier and part of the innate immune system's first line of defense.

B. Chemotaxis attracts phagocytes to the site where the pathogen invaded.: This is part of the inflammatory response, which occurs after the first line of defense has been breached; therefore, it is not considered a first line of defense action.

C. Natural killer cells are the first lymphocytes to react to infection.: While natural killer cells play an essential role in the immune response, they are part of the second line of defense and respond after pathogens have entered the body.

D. Phagocytes ingest microbes when they enter the body.: This is part of the second line of defense, as phagocytes respond to pathogens that have breached the first line of defense, which includes physical and chemical barriers.

A. Mouth: Digestion in the mouth is primarily due to amylase, which breaks down carbohydrates, not trypsin.

B. Stomach: Trypsin is produced as trypsinogen in the pancreas and is activated in the small intestine. While trypsin is crucial for digestion, it is important in the small intestine.

C. Large intestine: The large intestine is mainly involved in water absorption, not digestion by enzymes like trypsin.

D. Oesophagus: The esophagus transports food but does not produce enzymes like trypsin.