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Spæk

Spæk er en tyk, tæt lag af bindevæv og fedtvæv, til stede på hvalrosser, hvaler og sæler. Dette fedtvæv har en relativt lav varmeledningsevne (lavere end muskel eller hud).

Spækket på arktiske marine pattedyr både gemmer energi og giver isolering, så de kan overleve i koldt vand. Tykkelsen af dette lag kan nå op til 30 cm.

Til arktisk indfødte folk, er spæk (især hvalspæk), forudsat både høj energi, mad og olie til brændstof.

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