A hannu yanki: haltta

Upper reshe mutumin taka muhimmiyar rawa a juyin samuwar ya zama jinsi. A wannan labarin, za mu duba a wani bangare na mutane da dabbobi hannuwa, musamman sifa da aiki.

A] aukacin shirin tsarin da babba reshe

A babba ƙwarai kunshi sassa biyu. A farko da dangantaka bel kunshi clavicle da scapula. kwarangwal na free wata gabar jiki - na biyu bangaren ne a haɗe zuwa gare su. Ya kunshi daya unpaired humerus. Ta slidably haɗa ta ulnar da radial kafa hannu da dantse. Wadannan sassa na hannun - wannan goga. Sun kunshi carpal kasũsuwa, ashe, metacarpal da phalanges.

A na sama na da hannu

A tsarin wannan sashen hada guda biyu clavicle da scapula. Wadannan kasusuwa na babba reshe abin ɗamara samar da m dangane da akwati kwarangwal da free hannu. Clavicle a hannu daya aka haɗa ta lebur breastbone da kuma a kan sauran - tare da vane. Wannan kashi na dama mai lankwasa da kyau palpable ko'ina. Its main aikin alama a jiki ne wurin da kafada hadin gwiwa a nesa daga kirji. Wannan ƙwarai qara kewayon motsi daga cikin manya wata gabar jiki.

Ƙananan ɓangare na hannu

Kashi free ƙwarai kwarangwal movably da alaka da kuma samar da dama gidajen abinci: sternoclavicular, kafada, gwiwar hannu, radiocarpal. Duk wadannan Tsarin da guda tsarin shirin. A wani hadin gwiwa shugaban daya kashi na zurfafa daga cikin sauran. Don hadin gwiwa fuskoki ba fuskantar karfi gogayya, su maida hankali ne akan hyaline guringuntsi. Kowane irin wannan tsarin ne a cikin hadin gwiwa kwantena, to wanda aka a haɗe jijiyoyin da tsokoki.

Wasu sassa na hannun mutum da nasu halaye. Alal misali, thumb ne suka nuna adawa ga duk sauran. Wannan ake dangantawa da wani mutum ikon sane aiki.

A tsarin da hannuwa dukan dabbobi irin wannan nau'in tsirkiya. Ya kunshi uku ƙungiyoyin: kafada, hannu da dantse, kuma hannunka. Su morphological halaye da kuma bambance-bambance suna da alaka da mazauninsu na dabbobi. Saboda haka, a cikin tsuntsaye saboda su ikon tashi sama gabar jiki sun juya a cikin fuka-fuki. Ɓeraye da shrews samun su abinci, yin motsa a cikin ƙasa. Saboda haka, suna da m digging wata gabar jiki. Wakilai daga cikin tsari jemagu dabbobi masu shayarwa maida shi musamman domin aiki jirgin saboda gaban da fata folds da kuma elongated yatsunsu. Hoofed dabbobi su samu sunan saboda da gaban m jaraba tsarin kan su wata gabar jiki.

The inji daga cikin manya wata gabar jiki

All sassa na mutane da dabbobi hannuwa matsawa godiya ga tsokoki. Suna a haɗe zuwa kashi tare da wasu jijiyoyin cikin kafa. Muscle, sakamakon reshe motsi, a hade a cikin kungiyoyin biyu. A farko reshe ne lankwasa. Alal misali, biceps, ko da biceps sa hannu a cikin jiki. Extensors yi kishiya ayyukan. A cikin mutane, wannan aiki da aka yi da da triceps. Deltoid aiki a gaban kwatance. Its zaruruwa, a gaban farfajiya na hannu da dantse, da hannu ne lankwasa. Kuma waɗanda aka located a kan Reverse gefen - a kan m.

A fata na hannun ne daban-daban na rabe. Wannan musamman m tsarin cewa connect da jiki da muhalli. Sun iya canza a cikin daban-daban na jijiyar effects. Kamar yadda irin wannan, da bayanin da aka tsĩrar da su da ya dace yankuna na kwakwalwa bawo. Conductive hanyõyi a cikin wannan yanayin ne jijiya zaruruwa. A cikin kwakwalwa, bayanai da aka bincikar kuma a baya shugabanci da aka kawota ga aiki jiki. da dama iri rabe located a cikin fata na hannun. Inji gane matsa lamba da kuma tabawa. Sanyi da kuma dumi jiki tsinkayen via thermoreceptors. Ã'a, mafi yawansu duk fata na hannun kuma yatsunsu ne m ga ji zafi. Suna kafa nociceptors.

Upper wata gabar jiki saboda da peculiarities na tsarin yana da yawa muhimmanci ayyuka. Yana da ikon tashi, samar da abinci, da gina mafaka. A mafi nagartaccen siffofin yana hannun mutum da ta sa aikinsa, kuma shi ne tushen da yawa juyin canje-canje.