no. humans lack an enzyme to digest wood
Yes, humans can digest goldfish just like any other fish but I wouldn't recommend it.
Humans can't digest cellulose.
rock
humans use stomach acid to digest the food
None. Humans can't digest cellulose. Bacteria in the large intestine can digest some cellulose, creating gas and vitamin K.
to digest food
Fiber
they cant
No. Tissues are made of paper which is made from cellulose which humans cannot digest.
Humans can't digest roughage (eg. cellulose) because of the beta linkages that hold the glucose molecules together. Humans don't have enzymes that can break these linkages.
yeah i think so but it takes you 7 days to digest your food and 7 years to digest gum. so yeah we digest everthing