Essentials of Anatomy and Physiology

1. A friend suffers a knee injury involving damage to
   bone, cartilage, and ligaments. What can you tell
   your friend about the healing of these tissues?


2. Stratified squamous keratinizing epithelium is an
   excellent barrier to pathogens in the epidermis of
   the skin. Despite the fact that it is such a good bar-
   rier, this tissue would not be suitable for the lining
   of the trachea or small intestine. Explain why.
   3. Many tissues have protective functions, but it is
   important to be specific about the kind of protec-
   tion provided. Name at least three tissues with a
   protective function, and state what each protects
   the body (or parts of the body) against.
   4. Why is blood classified as a connective tissue?
   What does it connect? What kinds of connections
   does it make?

Tissues and Membranes 87

FOR FURTHER THOUGHT