Chapter 4, Problem 17MC

Endoskeletons: a. protect internal organs and provide structures against which the force of muscle contraction can work. b. differ from exoskeletons in that endoskeletons do not support the external body. c. cannot be found in echinoderms. d. are composed of cartilaginous structures that form the skull. e. compose the arms and legs.

The primary curvatures of the vertebral column ________. include the lumbar curve are remnants of the original fetal curvature include the cervical curve develop after the time of birth

The surgical removal of a joint is a/an._________________