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A manatee can move each side of its lip pads independently. This flexibility allows the manatee to "grab" aquatic plants and draw them into its mouth.

 
 

Manatees do not have eyelashes; their eye muscles close in a circular motion, much like an aperture on a camera. They have a lid-like membrane (called a nictitating membrane) that closes over their eyes for protection when they are under water.

Manatees can hear very well despite the absence of external ear lobes.

A manatee's heart beats at a rate of 50 to 60 beats a minute. The heart rate slows down to 30 beats a minute during a long dive.

Manatees have no "biting" teeth, only "grinding" teeth. A manatee's teeth (all molars) are constantly being replaced. New teeth come in at the back of the jaw and move forward about a centimeter a month. The front molars eventually fall out and are replaced by the teeth behind them. 

Manatees have only six cervical (neck) vertebrae. Most all other mammals, including giraffes, have seven. As a result, manatees cannot turn their heads sideways, they must turn their whole body around to look behind them.

The manatee's rib bones are solid, there is no marrow. They make red blood cells in their sternum where marrow is found.

 
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The manatee has pelvic bones, but they are not attached to its skeletal frame, they are remnants of the time manatees lived on land. The bones are found in a cartilage tissue area of the body in the vicinity of the reproductive organs and the urinary bladder. The bones are soft when the manatee is young and later harden as they mature.

Other remnant bones found in the manatee are the hyoid bones located near the neck region. These bones are similar to the Adam's apple in humans. Today, there is no known use of these bones in the manatee.

The manatee's lungs lie along its backbone instead of along its rib cage as is found in most mammals. Besides breathing, the lungs help the manatee with buoyancy control.

The bones in a manatee's flipper are similar to a human hand. The jointed "finger bones" of the flipper help the manatee move through the water, bring food to its mouth and hold objects.

Three or four nails are found at the end of each flipper.

 
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The adult manatee averages about 10 ft long and weighs about 1000 lbs.
 
     

 

Additional Manatee Fact Links:  
Save the Manatee Club
SeaWorld InfoBook
Ellie Schiller Homosassa Springs Wildlife State Park
   
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