UMary Allen
Intshayelelo: Ukubaluleka kokuva kwizilwanyana
Ukuva kubalulekile kwizilwanyana. Ibanceda babone amarhamncwa, bafumane amaxhoba, banxibelelane omnye nomnye, kwaye bajonge indawo abakuyo. Izilwanyana ziye zavela kwizakhono ezahlukeneyo zokuva ngokusekelwe kwiindawo zazo zokuhlala kunye neendlela zokuphila. Ezinye izilwanyana, ezinje ngamalulwane kunye nee dolphin, ziye zavelisa amandla okusebenzisa i-echolocation ukuhamba kwindawo ezingqongileyo. Izinja kunye neekati, ezizizilwanyana zasekhaya ezidumileyo, zikwaphuhlise izakhono zokuva ezizodwa ezibanceda banxibelelane nabanini bazo kunye nehlabathi elibangqongileyo.
I-Anatomy yendlebe: Indlela Izinja kunye neekati eziVava ngayo
Izinja kunye neekati zineendlebe ezifanayo, kodwa kukho ukungafani. Zombini ezi zilwanyana zinezahlulo ezithathu ezindlebeni zazo: indlebe engaphandle, umbindi wendlebe, kunye nengaphakathi lendlebe. Indlebe yangaphandle inoxanduva lokuqokelela amaza omsindo, ngelixa indlebe ephakathi ikhulisa isandi kwaye iyithumele kwindlebe engaphakathi. Indlebe yangaphakathi kulapho isandi sicutshungulwa size sithunyelwe ebuchotsheni. Izinja zineendlebe ezinde kuneekati, nto leyo ezinceda ukuba ziphakamise izandi kumgama omde. Iikati, kwelinye icala, zinendlela yokuva ebalaseleyo, nto leyo ebanceda ukuba bafumane izandi ngokuchanekileyo.