Ụlọ egwuregwu nwere njirimara nke nnukwu ohere, ọganihu miri emi, na nnukwu ibu oyi. Oriri ike ya dị oke elu, ọ na-esikwa ike ịhụ na ikuku dị n'ime ụlọ. Igwe ntụ oyi ikuku evaporation nwere njirimara ahụike, nchekwa ike, akụ na ụba, na gburugburu...
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