Question 1
Bone tissue is hard because its matrix contains
◦ collagen.
◦ iron.
◦ several minerals.
◦ calcium salts.
◦ elastic fibers.
Question 2
Cardiac muscle cells are associated with
◦ bundles.
◦ a sheath of dense connective tissue.
◦ voluntary responses.
◦ cells tapered at both ends.
◦ communication junctions.