Ukusika iziko zabantu: iimpawu

Wonke umntu uyazi ukuba ngenxa yobunzima beethambo zomzimba, kunokwenzeka ukuhambisa umzimba womntu kunye nendawo yawo nganye kwisithuba. Kodwa emzimbeni wethu kusekhona izitho zokusika. Bonke baya kwenza imisebenzi engenakulungiswayo yokusebenza ngokuqhelekileyo.

Ziziphi izitho

Okokuqala, makhe sibone ukuba liphi iqumrhu elikulo lonke. Le nxalenye yomzimba, ehlala kwindawo ethile, inesakhiwo esithile kwaye yenza enye imisebenzi okanye emininzi. Isici esibaluleke kakhulu kunoma yiphina iqumrhu kukuba amaxube amaningana afakwe kwi-composition yayo.

Ekubeni, kukho ezine zazo emzimbeni womntu: i-epithelial, i-connective, i-muscular neyoyiki. Zonke zazo zenziwe ngamaseli afana nesakhiwo kunye nomsebenzi.

Izivumelwano zomntu

Ukubunjwa kwamalungu enkontileka kuyabandakanya izicubu zeesundu okanye iiseli eziseduze nayo ngeepropati. Ngokomzekelo, i-collagen fibers ikhona kwesikhumba. Siyabulela kwesi sakhiwo, sinako ukusasaza kwaye asiphazamisi ukuphunyezwa kweendidi ezahlukahlukeneyo. Zonke izitho ezisikayo zingatshintsha umthamo kunye nobude bawo, kwaye ubuyele kumgangatho oqhelekileyo.

Iimpawu zesakhiwo seesisu zomzimba

Iisisu zomzimba ziqukethe iintambo zomntu ozibandakanyekayo, ezibizwa ngokuba yi-myofibril. Ezi zimbalwa zenziwe ngama-filaments ekhethekileyo amaprotheni, i-actin kunye ne-myosin. Phakathi komnye nomnye badibaniswe ngeebhanji ezijikelezayo. Impembelelo yemisipha ivuselela imicu ye-muscle, kwaye iqala ukuthenga. Ingundoqo yale nkqubo kukuba i-actin encedisayo ngoncedo lweebhuloho ezithintekayo zenziwa phakathi kwe-myoson. Ubude befiber muscle buyancitshiswa.

Izihlunu zesisundu ezicacileyo

Kukho iintlobo ezininzi zeethambo zomzimba. Ziziphi izitho zokusika ezenza izicubu ezinqabileyo okanye ezibethayo? Ezi ziimpawu kunye nezihlunu ze-squelet, i- diaphragm, i-larynx, ulwimi, inxalenye yesigxina. Iifayili zolu hlobo lwengubo zinde kwaye zininzi. Ngaphantsi kwe-microscope bajonge njengezinto ezikhanyayo ezikhanyayo.

Iimfucu zomzimba ezihlanjululwayo zibonakaliswa ngumlinganiselo ophezulu wokuqhekeka nokuphumula, eziqaphela ngokugqithisileyo. Emva koko, umntu ngokwakhe ulawula ukunyakaza kwamalungu kunye nokutshintsha ubuso obuso.

Iisifo zomzimba we-cardiac

Inhliziyo iyilungu elikhethekileyo. Uhlala esebenza emsebenzini, kuba ubomi bomntu buxhomekeke kwixesha lexesha lakhe. Ngoko ke, eli lungu lenziwa kunye nolunye uhlobo oluthile lwezicubu ezibethekileyo, ezibizwa ngokuba yi-cardiac. Inemimandla ekhethekileyo apho iifayili zomntu zifakwe khona. Esi sakhiwo siqinisekisa ukunciphisa ngexesha elifanayo lonke iqumrhu. Ukuqhuba ipropati ebaluleke kakhulu ye-muscular heart. Kuqulethe ekusasazeni umonakalo oye wavela kwindawo enye, kuwo wonke umzimba. Kwiiseli ezikhethekileyo zentliziyo ngezihlandlo zikhona iimpembelelo ezazisasazeka kwiintliziyo zentliziyo kwaye zilawula isigqithiso saso. Le propati ibizwa ngokuba yi-automatism.

Iimfucu zomzimba ezingcolileyo

Izitho zokusika zangaphakathi ziqulethwe zicubu ezihamba phambili, okanye ezingenakunyuswa. Le yimizila yesisu, isisu, i-bronchi kunye nemiphunga, iindonga zegazi kunye neempahla ze-lymphatic. Iiseli ezinobumba ezinobunzima bezicubu ezibusayo ziyi-mononuclear kwaye phantsi kwe-microscope ebonakalayo ibonakala ngokufanayo. Isalathisi sabo sesimo siqhekeza ngokukhawuleza kunye nokuphumula. Umsebenzi wabo awuyiyo into engabonakaliyo kwaye ayixhomekeke kwintando yomntu. Ngokomzekelo, asikwazi ukuyeka ukuphazamiseka kwesisu okanye emathumbu.

Ngoko, izitho zomntu ezithengiswayo zikwimeko yazo enye yeentlobo zeethambo zomzimba. Umsebenzi olungelelanisiweyo wentliziyo uqinisekiswa luhlobo oluthile lweemicu ezibetha. Izivumelwano ezinamaqabunga amathumbu ezincinci kunye nentsholongwane, ukwenza iindonga zezitho zangaphakathi. Ukuhamba komzimba kunye namacandelo awo ngamnye kunikezelwa ngamafayili athatywayo. Zihlawuleza kwaye zilawulwa ngabantu.