lidské srdce v číslech

27. prosince 2006 v 12:38

1. Několik číselných údajů o srdci

Srdce váží zhruba 350 gramů. Srdce je 12 cm dlouhé, 7,5 cm široké a 6 cm hluboké. V klidu tepe průměrnou rychlostí 70 tepů za min. To je asi 100 000 tepů za den a 2,5 miliardy tepů za život. V klidu srdce přečerpá jedním stahem 60 - 80 ml krve (člověk má celkem asi 4,5 - 5,5 litru krve). Srdce tedy za minutu přečerpá 5 - 10 litrů za minutu, záleží na okolnostech, tj. 12000 litrů denně. Toto je pouze teoretický odhad, skutečně přečerpá srdce mnohem víc, protože je namáháno. Po velké námaze může srdeční výdej stoupnout až na 45 litrů za minutu. (Číselné hodnoty z Hořejší, J.: Lidské tělo, Gemini, Bratislava 1991)

zdroj.http://blocek.net
 

2 lidé ohodnotili tento článek.

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