Cerca
Scopri nuove persone e i loro amici a quattro zampe, e fai nuove amicizie
tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination
tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination
tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination
tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination
transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energy