The creation of an opening into the upper region of the esophagus also is known as which of the following?

The classifications of mail vary according to all of the following EXCEPT

a. sender. b. weight. c. type. d. destination.

Clusters of which type of bone cells are responsible for bone remodeling?

a. Trabeculae b. Osteoclastic cutting cones c. Basic multicellular units d. Haversian system cells