Mfumo wako wa usagaji chakula hugawanya chakula kuwa virutubishi tofauti ambavyo hutumika mwilini.
Njia ya mmeng'enyo wa chakula (pia inaitwa njia ya utumbo na tumbo au GI) ni mrija mtupu ambao chakula hupitia unapokimeza, hukimeng'enywa, na kisha uchafu kutolewa kama kinyesi.
Je, umio ni nini?
Umio ni sehemu ya njia ya mmeng'enyo wa chakula. Ni "umio ya chakula" inayounganisha koo lako na tumbo lako. Chakula na vimiminiko haviteremki tu chini ya umio yako kwa kani ya mvutano. Umio yako imezungushiwa misuli ambayo husukuma chakula na vimiminiko chini.
Misuli mingine huzunguka ncha za juu na za chini za umio kama pete. Misuli hii, ambayo pia huitwa sfinkta, hufunga umio ili vitu vilivyo kwenye tumbo lako visiwezi kutiririka na kurejea kwenye umio au koo.
How the Esophagus Works
As a person swallows, food moves from the mouth to the throat, also called the pharynx (1). The upper esophageal sphincter opens (2) so that food can enter the esophagus, where waves of muscular contractions, called peristalsis, propel the food downward (3). The food then passes through the diaphragm (4) and lower esophageal sphincter (5) and moves into the stomach. |
