Answer:
can it be any physical activity
Explanation:
an organ system is a group of organs that work together for a common function. the order goes cells, tissues, organs, organ systems, organism.
Answer:
D all of the above
Explanation:
you shouldn't discount any of these goals in an excersise program, as they are all imperative to living a healthy life
Answer: layers
of sheathing
The
brain is protected by the skull and several layers of sheathing
from physical damage and insulate it against extreme temperatures. It is
encapsulated in several layers of connective tissue sheathing known as meninges
protecting fragile neural tissue and insulate the brain from different extreme temperature.
A doctor that specializes in the treatment of tumors and cancer would be an oncologist.
Hope that helps!