Exercise 6

4. row of small conical teeth on the margin of the upper jaw; absent in toads
9. composed of organ system
11. the posterior opening in the pharynx that leads to the stomach
12. cartilage supportive element of the tongue
13. two forward appendages
15. lower eyelids, and the transparent third eyelid called nictitating membrane
16. a single-celled organism shaped like a miniature slipper

1. peculiar streaming movement
2. are numerous hair-like projections around the pellicle
3. the most posterior part of the mouth cavity
5. circular area of thickened membrane behind each
6. self-fertilization
7. groove concave depression on one side of the anterior half of the organism
8. the distal end below tarsus
10. two small openings near the tip of the snout
14. found at the dorso-lateral portion of the head; these protected by the upper