Κυστη και ροή περιόδου

Question

&Kappa;&alpha;&lambda;&eta;&sigma;&pi;έ&rho;&alpha; &mu;&epsilon;&tau;ά &alpha;&pi;ό  &delta;&iota;ά&gamma;&nu;&omega;&sigma;&eta; &kappa;ύ&sigma;&tau;&eta;&sigmaf; &sigma;&tau;&eta;&nu; &omega;&omicron;&theta;&eta;&kappa;&eta; &tau;&omicron; &Sigma;&epsilon;&pi;&tau;&epsilon;&mu;&beta;&rho;&iota;&omicron; &eta;&rho;&theta;&epsilon; &eta; &pi;&epsilon;&rho;ί&omicron;&delta;&omicron;&sigmaf; &alpha;&kappa;&rho;&iota;&beta;ώ&sigmaf; &sigma;&tau;&omicron;&upsilon;&sigmaf; 2 &mu;ή&nu;&epsilon;&sigmaf;.&Eta; &rho;&omicron;ή &epsilon;ί&nu;&alpha;&iota; &mu;&epsilon;&gamma;ά&lambda;&eta; &mu;&epsilon; &kappa;&omicron;&kappa;&kappa;&iota;&nu;&omicron; &alpha;&iota;&mu;&alpha;.&epsilon;&iota;&mu;&alpha;&iota; &tau;ώ&rho;&alpha; &sigma;&tau;&eta;&nu; 4&eta; &mu;έ&rho;&alpha; &kappa;&alpha;&iota; &delta;&epsilon; &mu;&epsilon;&iota;ώ&nu;&epsilon;&tau;&alpha;&iota;.&Sigma;&upsilon;&nu;&eta;&theta;&omega;&sigmaf; &epsilon;ί&chi;&alpha; 3 &mu;&epsilon;&rho;&epsilon;&sigmaf; &mu;&epsilon; &epsilon;&lambda;ά&chi;&iota;&sigma;&tau;&eta; &rho;&omicron;ή.&Eta; &alpha;&upsilon;&xi;&eta;&mu;έ&nu;&eta; &rho;&omicron;ή &omicron;&phi;&epsilon;ί&lambda;&epsilon;&tau;&alpha;&iota; &sigma;&tau;&eta;&nu; &kappa;&upsilon;&sigma;&tau;&eta; ή &tau;&eta;&nu; &alpha;&pi;&omicron;&upsilon;&sigma;ί&alpha; &pi;&epsilon;&rho;&iota;&omicron;&delta;&omicron;&upsilon;? &Pi;ό&sigma;&epsilon;&sigmaf; &mu;έ&rho;&epsilon;&sigmaf; &theta;&alpha; &delta;&iota;&alpha;&rho;&kappa;έ&sigma;&epsilon;&iota;?