A bolus is a food and saliva mixture formed in mouth during the first phase of digestion (chewing). After the mechanical and chemical breakdown of the bolus, chime is formed in stomach and then expelled through the pyloric valve, into the duodenum (the extraction of nutrients form chyme begins here). Chyme is semi-fluid mass with pH about 2 and it consists of partially digested food, water, HCl, and various digestive enzymes.
Explanation:Viruses are a very huge problem these days as they are a 100 times bigger than an actual blood cell or bacteria a virus is just a bunch of bacteria in one big bunch
