Appendix, termed as “Useless”, Works silently!!!

The appendix is a tube like structure, which is connected to the cecum. It develops in the embryo. The exact position of cecum is at the junction of the large and small intestine.

Human Appendix Image, microbes world

Human appendix is 9 cm in length. It usually can range from 2 to 20 cm. In human, 26 cm long appendix was removed which the longest appendix ever. It usually located in the lower right quadrant of the abdomen, which near to the hip bone.

The immune tissue has the role to cover up the appendix and gut. This kind of tissues is called gut associated lymphoid tissue. A numerous number of significant function is carried out by it . Lacking for the distinctive shape of the appendix and specific importance and functions, it is removed from the human body. In the year of 2007, a group of scientists of Duke University suggested that for useful bacteria the appendix serves as a haven when illness washes out the bacteria from the rest of the intestines. On the other hand, it is showed by another group of researchers of Winthrop-University Hospital that individuals without an appendix were four times more likely to have a recurrence of clostridium difficile colitis. Again, they act as a ‘safe house’ for beneficial bacteria in the recovery from diarrhea.
Safe House Image, microbes world
The appendix which works as an important component mammalian mucosal immune system. The structure of appendix helps to remove the waste material in the digestive system. They contain lymphatic vessels which produce early defenses that prevent deadly diseases. They provide more immune defenses against pathogens which invade into the host.

The human appendix has a vestigial structure. It has lost all of its original function or has evolved to take a new function. It was suggested by great scientist, Charles Darwin that the appendix was once used for digesting leaves. It shows the evolution occurred in human. This organ of ancient human has degraded, lost its original purpose and evolved to take a new purpose. The very long cecum of horse appears to support this theory. Their cecum enables their gut bacteria to break down cellulose. When human began to eat more easily digested food, the appendix became workless. The less necessity for digestion occurred mutation. The lost their appropriate function but survives for a new purpose and work silently for human immune system.


Blog written by: Maksudur Rahman Shihab
B.Sc. Student in Microbiology, Jagannath University, Bangladesh

No comments

Theme images by Jason Morrow. Powered by Blogger.