3. Which part of the skeletal system is a rigid case that protects the brain?
A. Skull
C. Hinge joint
B. Spinal column
D. Ball and socket
4. Which of the following is the function of the integumentary system?
A. It protects the body against UV rays.
B. It serves as the barrier of the body from physical damage.
C. It is body's outer covering
D. All of the above
5. What is the thinnest and outermost layer of the skin?
A. Sebaceous gland B. Sweat gland C. Epidermis d. Dermis
II. Direction: Explain how the different oroans of the dignati​