The lining of the colon is different from the small intestine in that there exists a large number of mucous cells that do not secrete enzymes but rather mucous. The mucous helps protect the wall from the bacterial fermentation inside. About 1.5 L of liquid digestive contents, chyme, pass into the colon.
Communicable disease refers to diseases that can pass from one person to another. Non-communicable diseases occur in one person and cannot be passed on to another person. Communicable diseases are also known as infectious diseases, and non-communicable diseases are referred to as chronic.
Noncommunicable diseases. Noncommunicable diseases (NCDs) are usually caused by genetic or lifestyle factors. Four types of NCDs â cardiovascular diseases, cancers, diabetes and chronic respiratory diseases â account for almost two-thirds of all deaths globally, with 80 per cent of these occurring in low- and middle-income countries.