construction of this sentence is correct?
observing structure of the human anatomy has a long history of science, but there is always a question how the man during standing, walking or running gets required energy and uses it.

Question

Answer

Observing the structure of the human anatomy have been a part of the long history of science. However, there is always a question about how a human being obtains energy and uses it whilst standing, walking or running.

You could use 'But' instead of 'However' but 'However' is more formal for this kind of writing. Hope it helps :)

Não perca a oportunidade de aprender uma língua no conforto da sua casa. Navegue pela nossa seleção de professores de línguas experientes e inscreva-se na sua primeira aula agora mesmo!