Narkewa kamar gabobin: tsaga da kuma koyi

Narkewa - wani tsari da muka kawo a sume, aka tsunduma a cikin kwayoyin a kan reflex matakin. Wannan tsari ne mai rikitarwa, saboda haka istinbadi tambayi na bincike mutum, "Mene ne narkewa?". Daga cikin ra'ayi na likita, shi ne abincin da aiki, jiki da kuma sinadaran. A sakamakon haka, shi ya zama mai yiwuwa sha na abubuwa, kazalika da cire sharar kayayyakin.

narkewa kamar gabobin - ya ce m gabobin, da baƙin ƙarfe kari, wanda taimaka karya saukar da sinadaran shaidu a cikin kayan. Alal misali, dankalin turawa, burodi carbohydrates da kuma carbohydrates ne a cikin nau'i na sitaci, su ba za a iya koya har da sitaci kwayoyin suna karye to glucose. Nama gina jiki ma kanta iya assimilate - bukatar fadada shi zuwa aka gyara - amino acid (daga wanda jiki iya gina da kansa gina jiki). Fats da se bazai cikin jiki na matsakaici - kawai bayan gare ta narkewa an samu m acid da kuma glycerin.

Narkewa kamar Physiology ne cewa abubuwa da, yayin da a cikin jiki, ba a cikin jiki yanayi. Don yin wannan, suna da sha da yawa canje. Kuma a sa'an nan da shi ya auku ta hanyar bakin ciki mucosal sha. Ingestion kuma sun hada da hanta, salivary gland shine yake , kuma pancreas. Bugu da kari, a cikin bango na narkewa kamar gabobin da gland da cewa samar da zama dole abubuwa ga narkewa. Duk da ganuwar an rufe tare da gamsai, ta haka ne rage yiwuwar zuwa cuta da m harsashi.

Mechanically abinci bi da hakora, to, shi ne gauraye da yau. Yau ne uku nau'i-nau'i daga manyan gland da yawa karami su. A wannan ruwa aka gyara su ne Organic, ma'adinai abubuwa da kuma bazuwar kayayyakin na leukocytes. Amma babban abu - shi ya ƙunshi biyu enzymes - ptyalin (karya saukar da sitaci) da kuma maltase (tsãgewar ƙwãyar sugar hatsin rai, da sha'ir, da dai sauransu). Daga bakin ta hanyar da pharynx da abinci shiga cikin esophagus.

Esophagus - tube cewa za a iya kira a fairly mike layin. An rufe multilayered squamous epithelium. Wadannan Kwayoyin suna kullum ana updated, domin suna sosai sauki cuta. Fission auku a cikin zurfin yadudduka, yayin da waje exfoliated da kuma saukar a cikin ciki tare da abinci. A submucosa da kananan adadin ciwon daji - ciwon daji na esophagus. Around da ciki, suna kama a abu su tsaya a kan ciki, suka kai da sunan cardiac gland shine yake. A farkon da esophagus yawa striated tsoka, amma a cikin ƙananan uku kawai da m tsoka zaruruwa. hadiya aiwatar fara sani, amma sai switched reflex martani. Bayan esophageal ci abinci da yawa narkewa kamar gabobin kamar da ciki da kuma hanjinsu.

Ciki aiki a matsayin kyakkyawan mahautsini saboda tsoka ci gaba. A wannan jiki zai fara sunadaran tsakiyan nonon ta amfani da pepsin enzyme, kwayoyin cutar suna kashe hydrochloric acid. A sakamakon na narkewa a cikin ciki jũya Semi-ruwa abinda ke ciki a ko'ina yankakken - chyme. Daga shi ne tunawa, a wuri guda wasu gishiri da ruwa, barasa, wasu magunguna. A ciki samar da kwayoyin antianemic factor.

Da zarar abinci shiga cikin kananan hanji. A tsawon shi - da matsakaita na shida mita. A farko 30 cm - da duodenum. An haɗe zuwa m gabobin, kuma yanã tafiya a kusa da shugaban na pancreas. Sa'an nan fitowa to jingina, sa'an nan da ileum. A cikin kananan hanji kammala narkewa da selectively kayayyakin na narkewa suna tunawa a cikin jini, kuma Lymph. A cikin kananan hanji da ilimi na musamman - cikin villi, wanda ya kara da tsotsa yankin. A cikin hanji kwarara ducts na hanta (bile) da kuma pancreas. A sakamakon haka, shi ne a karshe narkewar da kuma tunawa carbohydrates, fats da kuma sunadarai. Kuma fats zo kai tsaye a cikin Lymph, wanda sai ta haɗu da jini.

A babban hanji narkewa sharan cikakken, amma "domin kansa", surkin jini kwayoyin. Tunawa ruwa, da kuma abinci tarkace saya da daidaito na faeces. A karshe sashe, dubura tõzarta jiran da za a cire a kan aiwatar da defecation. Kamar wancan ƙare aiwatar da narkewa. Yana da muhimmanci duk narkewa kamar gabobin, amma su hadewa aikin zai iya taimaka jiki ta Kwayoyin wartsake ta gaban ginin abu don Kwayoyin.