Cancer (dabba): tsarin da kuma yanayi

Cancer - crustaceans aji dabba. Yana da wuya su yi tunanin wani kandami, wanda ba zai zama mai wata biyu daga m pincers. Kuma abin da damar da zai iya zama nemi crabs! A'a, shi ne ba a banal kamawa tare da "rakolovok", muna magana ne game da wannan yaki, daya a kan daya. Lokacin da na sanda a flippers da kuma rufe fuska kamar bĩga daga gare ku Barbel (da kawai inda akwai magana game da slowness da sluggishness crabs?), Kuma a sa'an nan, a lokacin da riga kusan gudanar ansu rubuce-rubucen da shi, ya sauri boyewa a cikin wani rami ... a cikin zãfi na bi, ba tunanin game da hadari , thrusting hannuna, da kuma a nan shi ne - lokacin da gaskiya! Ina so in yi kururuwa fita a ciwo, amma ba za ka iya ... da kuma ciwon daji tam kama fika ga yatsunsu ta abuser. Manufar aka samu - da aka azabtar a cikin keji, amma wanda samun kama, har yanzu bukatar fahimta. Duk da haka, mu ne kadan kwashe, domin kana bukatar ba a fara da wannan. Da farko, bari mu magana game wanda da ciwon daji, abin da suke da halaye. Saboda haka, a wannan labarin, za mu duba a cikin sassan jiki na crustaceans, su hanyarsa ta rayuwa, da kyau, ba zato ba tsammani - halaye.

Bari mu tuna da darussa na ilmin dabbobi: tsarin da arthropod

Cancer - invertebrate dabba, jikinsa a fili kasu kashi a gaban part - Fused cephalothorax rufe da brownish-kore da kuma karfi sosai makamai. da kuma mayar da - segmented ciki, kawo karshen tare da fadi da filafilin kifi. A ta kai akwai nau'i biyu daga tsaye bakin ramin. A farko biyu ne takaice - a olfactory gabobin. Na biyu, dogon tsaye bakin ramin, suna da alhakin gabar touch. The idanu na ciwon daji kamar yadda idan dasa a cikin matakai, da mai tushe, suke yin amfani da tsokoki za a iya ja daga da kuma retracted a ciki. Top rufe jikinsu na frontal spinous matakai cewa yin up da ƙarshen gaban na carapace na cephalothorax. The baka rami da aka kewaye da dama nau'i-nau'i daga mandibular appendages wajen hadaddun tsarin, saboda abin da, kafin su shiga cikin bakin abinci finely frays. Ƙananan ɓangare na cephalothorax yana da biyar nau'i-nau'i daga wata gabar jiki. A farko daga gare su - a manyan kambori. Tare da su taimako, da ciwon daji rike da abinci a gaban ka, da kuma kare da abokan gaba. Tafiya da fika ba amfani. Cancer koma ta hanyar da ake kira tafiya da kafafu (sauran hudu da nau'i-nau'i). A iyakar da farko da na biyu da nau'i-nau'i dauki kashi rudimentary fika, da kuma na uku da na hudu karshen fika.

Kuma abin da ke cikin?

A ciki tsarin crustaceans hada da wadannan tsarin: narkewa kamar, Sistem, na numfashi, excretory. Na farkon su shi ne tafarki tube da kuma, kamar duk arthropod aka hada da gaban, na tsakiya da kuma raya ectodermal hanji. Jijiyoyi a crayfish - Open type, watau hemolymph gudana ta hanyar da sinuses da kwanoni miksotselya. The zuciya ne located a kan Gut, a cikin dorsal part. Tsarin Numfashi crustaceans wakilta gills, wadda aka kafa a cikin wani musamman rami a karkashin carapace. Suna located in uku layuka. A excretory tsarin da aka wakilta kodan, wanda aka modified tselomoduktami. Cancer - dabba musculature wanda yake shi ne striated tsoka nama. Ba shi da wani fata-murdede jakar kwai, tsokoki aka wakilta raba manyan jigajigan.

jima'i division

Mace da namiji ne dan kadan daban-daban crustaceans jiki tsari. Alal misali, mutum namiji mallaka manyan da kuma iko fika, su ciki nisa yayi dace cephalothorax, gaban na ciki da kafafu suna da kyau ci gaba. Mãtan suna da kananan fika, ciki da kadan fadi fiye da cephalothorax, da kuma gaban kafafunsa ne underdeveloped. Duk da haka, wadannan bambance-bambance ne m kawai wani gogaggen ido. Amma mutumin da ya ƙware cikin crustaceans na musamman daga gastronomic ra'ayi, da kamar wuya a iya rarrabe namiji daga mace.

"Armor ne da karfi da kuma mu tankuna masu azumi"

Kamar yadda aka tattauna a baya, wani ciwon daji - invertebrate dabba, amma ya na da karfi chitinous exoskeleton. Ya karfi makamai na samar da kariya daga abokan gaba, amma ya hana ciwon daji ci gaba da kuma inhibits da girma. Saboda haka, daga lokaci zuwa lokaci crustaceans zubar da wuya cover (wannan tsari za a iya kwatanta su Molina). Tare da tsananin wahalar da dabbobi na jan daga da harsashi da kambori ƙafafunsa, ko da ta faru da cewa sun zo kashe, amma rasa wata gabar jiki girma sake. Gaskiya, suka sãɓã wa jũna a cikin size da kuma bayyanar. Sake saitin harsashi yana daga 'yan mintoci cikakken rana. Bayan haka, ciwon daji zama m da yake a ɓõye, daga m abokan gaba. Duk da yake jikinsa an rufe tare da m fata na dabba da aka girma cikin sauri a tsawon. harsashi solidification ne da za'ayi a cikin daya da rabi watanni. Molting a cikin matasa crayfish faruwa akai akai fiye da a manya.

rai yanayi

Crustaceans kasance yafi a cikin jihar bakin teku sashi, inda master zurfin zuwa uku - biyar mita. M ƙauyuka ba su samar da wata tattara a shafukan da cewa suna located a m, kuma m bankuna hada lãka, silt, peat ko yashi ƙasa, wanda sosai dace don Burrow. Cancers ne sosai m zuwa ruwa quality, kazalika da adadin narkar da oxygen a cikinta. Idan tafki ne gurbata zamantakewa-masana'antu sharar gida da kuma wanke-wanke aikin noma da magungunan kashe qwari (herbicides, kwari da kuma m. P.), Sa'an nan bace daga crustaceans irin ruwa.

crustaceans

A kasar mu, sanaki uku main iri: thick-, kuma clawed crayfish. Kamar yadda sunan wanann, suka bambanta kawai a cikin tsarin da kambori. Mafi na kowa clawed crustaceans. Samfurori da wannan dabba a cikin daban-daban jikin ruwa yana iya zama dan kadan daban-daban a matsayin ilmin halitta da kuma tsarin da jiki. Sau da yawa a cikin wannan ruwayen shirya kawai da wakilan da wannan nau'in, amma akwai iya zama ware. Shirokopalye cancers ake samu, yafi a ruwa tare kõguna da kõguna a cikinta, kazalika a tsabta tabkuna. Wannan nau'in na decapod crustaceans dace a Final mallaka a kan m, kuma ba zato Coast. M-da cutar daji, a akasin haka, kusan rayuwa a cikin sabo ruwa, sun fi son ruwan zartsi ruwan estuaries kuma girgiza yankunan teku. A clawed crustaceans zauna biyu ruwan zartsi, kuma ruwa tare, sun kasance ƙasa da wuya muhalli yanayi, saboda haka, sun fi kowa fiye da sauran iri. Suna iya shirya, har ma a m ruwan da ma ƙananan abun ciki na oxygen. Kamar yadda wakilan wadannan mafaka arthropod amfani da zurfafa tsakanin duwatsu a karkashin sunken itatuwa, daga cikin tushen da kuma mai tushe na ruwa shuke-shuke. Bugu da kari, wadannan cancers sukan binne shi a cikin laka, kamar wancan ne suke bambanta daga takwarorinsu shirokopalyh.