1. _____ is a tough, flexible tissue and is the one cushioning the end of the long bones where they meet. 2. _____ protects the skin by absorbing ultraviolet rays of the Sun and determines the skin color. 3. A coll tube in which major digestions of food occurs is called _____. 4. A ______ is a hollow muscular organ where urines is temporarily stored. 5. __ __ is a tube which acts as a passageway for both air and food. 6. A ____ are involuntarily muscles present only in the heart. 7. The outermost layer of the skin is called ____. 8. Trachea is also known as ____. 9. A hairlike structure in the nasal cavity that filters the dust in the air is called _____. 10. The main organs of the urinary system is called _____ .
