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.
Hiv a Communicable Disease HIV: A Communicable Disease HIV, Human Immunodeficiency Virus, is a communicable disease... that was once considered a death sentence years ago. It is a disease that is contracted by the exchange of bodily fluids such as blood, semen, and vaginal secretions.