I-Anatomy kanye ne-Physiology yeSistimu Yezinzwa Ezingaguli Umgogodla
Uhlelo lwezinzwa luyisici esiyisisekelo ku-biology yazo zonke izilwane, lusebenza njengesikhungo sokulawula imisebenzi yomzimba kanye nezimpendulo ezisuselwe ezintweni ezithinta imvelo. Kubantu abangenamgogodla, ukuhlukahluka kwesakhiwo sesistimu yezinzwa kanye nokusebenza kwayo kubanzi njengeqembu ngokwalo, elihlanganisa izidalwa ezisukela eziponji zasolwandle ezilula kuya kuma-arthropod ayinkimbinkimbi. Lesi sihloko sihlola ukwakheka komzimba kanye nokusebenza kwesistimu yezinzwa ezilwaneni ezingenamgogodla, siqokomisa ukuzivumelanisa nezimo okuhlukile okusekela ukusinda kwazo kanye nokusebenzisana nendawo ezikuyo.
1. Izici Ezijwayelekile
Izilwane ezingenamgogodla azinawo umgogodla, kodwa lokhu akubakhiphi ngaphandle kokuba nezinhlelo zezinzwa eziyinkimbinkimbi. Ngenkathi ezinye izilwane ezingenamgogodla njengeziponji (i-Phylum Porifera) zingenazo izinhlelo zezinzwa zangempela, ezinye, njenge-cephalopods (i-Cephalopoda ye-Mollusca), zibonisa izinga eliphezulu lobunzima bezinzwa.
2. Uhlelo Lwezinzwa Olulula Kakhulu
Kusukela ezinhlotsheni ezilula kakhulu, iziponji zimelela ama-metazoan asendulo kakhulu. Iziponji azinawo ama-neuron noma izicubu zemizwa. Esikhundleni salokho, zithembele ohlelweni lwamaseli olungenazo izinzwa ukuze zidlulisele ulwazi. Amaseli athile afana nama-choanocytes (amaseli ekhola) akhiqiza imisinga yamanzi ngemibhobho yawo, okuvumela isiponji ukuthi sihlunge ukudla.
3. Ama-Hydra kanye nama-Nets Emizwa
Uhlobo oluhlelekile kakhulu lwesimiso sezinzwa lungabonakala kumaCnidarians, njenge-hydra. Lezi zidalwa zinenethi yezinzwa, uhlelo lwezinzwa oluyisisekelo nolungenawo ubuchopho obuphakathi. Amanethi ezinzwa avumela izimpendulo ezilula neziqondile ezishukumisayo. Inethi iqukethe inethiwekhi yamaseli ezinzwa axhumene (ama-neurons) enza kube lula ukudluliselwa kwemizwa kagesi. Lokhu kuvumela ama-cnidarians ukuthi abonise ukuziphatha okulula njengokufinyela kanye nokunyakaza kokuhlasela.
4. Ama-Platyhelminthe kanye ne-Simple Cephalization
Kuma-flatworms (i-Phylum Platyhelminthes), sibona ukuvela kokulingana kwamabili kanye ne-cephalization—umkhuba wokuziphendukela kwemvelo lapho uhlelo lwezinzwa lugxila khona ekugcineni kwesinye sezinto eziphilayo, kwakha ubuchopho obuyisisekelo noma i-ganglia. Lezi zakhiwo zihlanganisa okokufaka kwezinzwa futhi ziqondisa ukunyakaza. Ama-flatworms anesimiso sezinzwa esifana nesitebhisi, lapho izintambo zemizwa ezinde zigijima khona ubude bomzimba futhi zixhunywe yizinzwa eziphambeneyo.
5. Ama-Annelid kanye Nezinhlelo Zezinzwa Ezihlukanisiwe
Njengoba sikhuphuka ileli lokuziphendukela kwemvelo, izinhlelo zezinzwa ze-annelids (i-Phylum Annelida) njengemibungu yomhlaba zibonisa ubunzima obukhulu. Ama-Annelids anentambo yemizwa ye-ventral ene-ganglia ehlukanisiwe. Ingxenye ngayinye yomzimba iqukethe i-ganglion yayo, elawula izimpendulo zendawo. I-cephalic ganglion, evame ukubizwa ngokuthi 'ubuchopho' be-annelids, icubungula ulwazi lwezinzwa futhi isize ukuxhumanisa umzimba wonke we-annelid.
6. Ama-arthropod: Ubunzima besakhiwo kanye nomsebenzi
Ama-arthropod (i-Phylum Arthropoda), okuhlanganisa izinambuzane, ama-crustacean, nama-arachnid, abonisa izinhlelo zezinzwa eziyinkimbinkimbi. Anobuchopho obuchazwe kahle obusekhanda, obuxhunywe entanjeni yemizwa ye-ventral kanye ne-ganglia ehlukanisiwe. Ubuchopho be-arthropod buhlukaniswe ngezifunda ezikhethekile njenge-protocerebrum, i-deutocerebrum, kanye ne-tritocerebrum, ngayinye enesibopho sokucubungula izinhlobo ezahlukene zokufakwa kwezinzwa kanye nokuqondisa imisebenzi yokunyakaza.
Isibonelo, uhlelo lwezinzwa lwezinambuzane lulawula ukuziphatha okuyinkimbinkimbi njengokundiza, ukuzulazula, kanye nokuxhumana nabantu. Luqukethe ama-neuron angaba yisigidi, okwenza imisebenzi esukela ekuziphendukeleni okulula kuya emisebenzini ethuthukile njengokufunda kanye nenkumbulo.
7. Ama-Mollusk: Ukuhlelwa Okuhlukahlukene Kwezinzwa
Ama-Mollusk (i-Phylum Mollusca) aveza uhla olubanzi lwezinkinga zesimiso sezinzwa. Ngenkathi ama-gastropod (iminenke nama-slugs) enenhlangano elula yezinzwa ene-ganglia ebhangqiwe, ama-cephalopod (ama-squid, ama-octopus) anezinhlelo zezinzwa ezithuthuke kakhulu phakathi kwezilwane ezingenamgogodla. Ama-Cephalopod anobuchopho obukhulu, obuphakathi obunama-lobes nama-tract, obukwazi ukucubungula okuyinkimbinkimbi nokulawula ukuziphatha okuyinkimbinkimbi njengokucasha, ukufunda kwendawo, kanye nokuxazulula izinkinga.
Izinhlelo zemizwa ze-cephalopod zingaqukatha ama-neuron afinyelela ku-half billion, kanti ingxenye enkulu itholakala emehlweni azo ayinkimbinkimbi, ahlinzeka ngamakhono okucubungula okubonakalayo athuthukile. Amandla azo okuguqula ama-chromatophores (amangqamuzana e-pigment esikhumbeni) ukuze akwazi ukuxhumana noma ukufihla abonisa ukulawulwa okuyinkimbinkimbi kwe-neurophysiological.
8. Izindlela Zokusebenza Kwemvelo
Naphezu kokwehlukahlukana kobunzima besimiso sezinzwa, izimiso ezithile eziyisisekelo zomzimba zabelwana ngazo ezilwaneni ezingenamgogodla. Ama-neurons, umgogodla wesimiso sezinzwa, asebenza ngokukhiqiza amandla esenzo - izinguquko ezisheshayo emandleni e-membrane ahamba nge-membrane yeseli lezinzwa. Ama-synapses enza kube lula ukudluliselwa kwalezi zimpawu phakathi kwama-neurons noma kusuka kuma-neurons kuya emisipheni, kusetshenziswa ama-neurotransmitters njengezithunywa zamakhemikhali.
Ama-neurotransmitter afana ne-acetylcholine, i-dopamine, kanye ne-serotonin adlala indima ebalulekile ekulawuleni umsebenzi wezinzwa kanye nokuziphatha, ukuqinisekisa ukuthi izilwane ezingenamgogodla zingasabela ngendlela efanele endaweni ezikuyo.
9. Umbono Wokuziphendukela Kwemvelo
Ngokombono wokuziphendukela kwemvelo, ukuthuthuka kwesimiso sezinzwa ezilwaneni ezingenamgogodla kugqamisa ukuthambekela kokwandisa ukugxila kanye nokukhethekile. Lokhu kuthuthuka kokuziphendukela kwemvelo kusekela ukuthuthukiswa kokuziphatha okuyinkimbinkimbi kanye nokusebenza, okuvumela izilwane ezingenamgogodla ukuthi zivumelane nezizinda ezahlukahlukene zemvelo.
Ukuvela kwesimo somzimba kanye nokwezinto eziphilayo kuchaza kabanzi ngezinto ezibalulekile zokusinda njengokuqonda okukhulu kwezinzwa, ukunyakaza okuthuthukisiwe, kanye nokusebenzisana okuyinkimbinkimbi komphakathi. Izinhlelo zezinzwa zezilwane ezingenamgogodla zibonisa uhla olumangalisayo lokuzivumelanisa nezimo, okubonisa impumelelo yazo emvelweni kanye nokuguquka kwazo ezindaweni ezahlukene zokuhlala.
Isiphetho
Ucwaningo lwezinhlelo zezinzwa ezilwaneni ezingenamgogodla lwembula uhla oluthakazelisayo lwezakhiwo zezinzwa, ngayinye ivumelaniswe nendlela yokuphila ethile kanye nendawo ezungezile yezinto eziphilayo. Kusukela kunethiwekhi yezinzwa zama-cnidarians kuya ebuchosheni obuyinkimbinkimbi be-cephalopods, izinhlelo zezinzwa ezingenamgogodla zibonisa ububanzi bokusungula izinto ezintsha eziphilayo, okugcizelela ubudlelwano obuyinkimbinkimbi phakathi kwesakhiwo, umsebenzi, kanye nokuzivumelanisa nemvelo. Ukuqonda lezi zinhlelo zezinzwa ezahlukahlukene akugcini nje ngokuhlinzeka ngemininingwane ngebhayoloji yezinzwa ezingenamgogodla kodwa futhi kuthuthukisa ukuqonda kwethu okubanzi kokuvela kanye nokusebenza kwesistimu yezinzwa kuzo zonke izinhlobo zokuphila.
