Which body system do you think does the most work during growth and development of the human body

What is the membrane that sheath of schwann cell containing cytoplasm and nucleus that encloses myelin

This connective tissue consists of large round densely packed cells with the nucleus pushed to one side.

Which of the following would involve looking at different structures of organisms and comparing how similar they are? a. vestigial structuresb. radiometric datingc. homologous structures