Is a cow open, close or isolated

Biomass can be used to generate electricity. biomass relies heavily on agricultural crops. plants release carbon dioxide and water in combustion. plants use photosynthesis to originally generate the energy that is needed. the chemical energy of these plants all started with what energy source?

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

In which part of the body is a ball-and-socket joint found?