Muscles that encircle tubes and act as circular valves are called

What is the term for bone marrow tumor? osteoma myeloma osteocele osteomyoma

If water were a non polar molecule, how would its properties be different ? a.) water would be a much lighter molecule b.) water would be able to climb up inside plants c.)water would not be able to form hydrogen bonds d.) water would stick together much more strongly

Describe the overall function of the nervous system