49. What is the primary function of the trabeculae in spongy bone? A. Protect the bone surface B. Provide a lightweigh t framework C. Store yellow marrow D. Facilitate bone elongation E. Absorb shock 50. The primary germ layers formed during gastrulation include all of the following A. Ectoderm A. Ectoderm D. Blastoderm E. None of the above 51. Which muscle type is characterized by involuntary control and is found in internal organs? A. Skeletal Muscle B. Cardiac Muscle C. Smooth Muscle E. Voluntary Muscle 52. What type of connective tissue forms the periosteum? A. Dense Fibrous Tissue B. Loose Areolar Tissue D. Reticular Tissue E. Cartilage 53. Which part of the skeletal system protects the heart and lungs? C. Rib Cage E. Clavicle parts? A. Flexion B. Extension C. Rotation D. Abduction E. Circumduction 55. Which part of a long bone is primarily composed of spongy bone? A. Diaphysis C. Metaphysis D. Medullary Cavity E. Compact Bone 56. What is the largest carpal bone? A. Scaphoid B. Lunate C. Capitate D. Hamate E. Trapezium 57. The anatomical term for the sole of the foot is: A. Dorsal B. Ventral C. Plantar E. Lateral 58. Which of the following is a sesamoid bone? A. Femur B Patella C. Radius D. Tibia E. Ulna