Skeletal system refers to the framework of bones and _____ which can protect our organs and allow us to move.
A. tendon
B. cartilage
C. muscle
D. skeleton
Red marrow in certain bones can prduce blood cells, which is called ______.
A. hematopoiesis
B. lymphopoiesis
C. erythropoiesis
D. leukopoiesis
Long bones consist of a _____ and a variable number of epiphyses.
A. diaphysis
B. esophagus
C. metaphysis
D. osteolysis