V novom puteshestvii dyadya Kuzya rasskazyvaet CHevostiku o stroenii nashego organizma — o ego samyh vazhnyh sistemah i vnutrennih organah. Kak proiskhodyat processy krovoobrashcheniya, gazoobmena i pishchevareniya. Dlya chego nam nuzhny serdce i legkie, mozg i zheludok, pechen' i pochki. Kak rabotayut nashi myshcy, glaza i ushi. Slushaya rasskaz dyadi Kuzi, vy uznaete, pochemu krov' temneet, zachem lyudi poteyut, otkuda my berem energiyu, kak my chuvstvuem myagkoe i shershavoe, holodnoe i goryachee. A takzhe naydete eshche mnogo-mnogo otvetov na detskie voprosy, kotorye zastavyat vas udivit'sya — kak zhe interesno ustroen chelovek! Kniga prednaznachena dlya detey mladshego shkol'nogo vozrasta.