Question

90 vegistial organs in our body

Answer 1

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1. Appendix – The Vermiform Appendix is a vestigial organ in our digestive system which was functional in our ancestors and had some digestive functions. It is present in some mammals like rodents, primates (superorder: eurachontoglires) and help in digesting cellulose and other such indigestible components of plants.

In adult humans, appendix performs immune functions. Lymphoid tissue gets accumulated in the appendix within a short time after birth. The accumulation of lymphoid tissue reaches its peak somewhere between 20 and 30 years of age and then it starts falling rapidly only to completely disappear after 60 years of age is attained.

Scientists now believe that appendix actually exposes WBCs (White Blood Cells) to various foreign substances or antigens that are present in gastrointestinal tract, thereby suppressing potentially destructive lymph-borne and blood-borne (together known as humoral) antibody responses.

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