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.
One important difference between communicable and non-communicable disease is that non-communicable diseases tend to be chronic, which means they last a long time and progress slowly. Communicable diseases are more likely to be acute, which means the disease develops quickly.
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.