Mashoko Emuzasi

a Mubhuku rake rinonzi The Descent of Man, Charles Darwin akataura kuti dzimwe nhengo dzomuviri “hadzina basa.” Mumwewo aidavira kuti zvinhu zvakaita zvokushanduka-shanduka akataura kuti mumuviri womunhu mune nhengo dzakawanda dzisingashandi dzakasarira pakashanduka vanhu, dzinosanganisira iri mudumbu inonzi appendix neiri muchipfuva inonzi thymus.