H. HEAD 1. Teeth are conical and interlocking. They are desinged for grasping food not chewing. The number of teeth varies considerablyamong individuals. Most individuals have 20 to 25 teeth on each side of the upper jaw and 18 to 25 teeth on the side of the lower jaw, a total of 76 to 98 teeth.
Eyes are on the sides of the head, near the corners of the mouth.
Glands at the inner corners of the eye sockets secrete an oily, jellylike mucus that lubricates the eyes, washes away, debris, and probably helps stream line a dolphin's eye as it swims. This tearlike film may also protect the eyes from infective organisms. 4.Ears, located just behind the eyes, are small inconspicuous openings, with no external pinnae. A single blowhole, located on the dorsal surface of the head, is covered by a muscular flap. The flap provides a water-tight seal.