Otters have long, slim bodies and relatively short limbs with webbed paws. Most have sharp claws on their feet and all except the sea otter have long, muscular tails. The 13 species range in adult size from 0.6 to 1.8 m (2.0 to 5.9 ft) in length and 1 to 45 kg (2.2 to 99.2 lb) in weight. The Oriental small-clawed otter is the smallest otter species and the giant otter and sea otter are the largest.
Atlantoaxial-synovial; pivot. The joint between the atlas and axis is called the atlanto-axial joint. It is comprised of the anterior portion of the ring of C1 and the odontoid process (or dens) of C2.This joint allows for about 50 percent of the side to side rotation of the head.ry and shake your head no, this is due to the pivot joint of the two vertebrae! this joint also known as atoaxoid joint. pivot. it is called the atlanto-axial joint. The joint between atlas and axis is called the atloaxoid joint. This joint is a pivot joint that allows the head to turn from side to side.
A synovial joint, also known as diarthrosis, is the most common and most movable type of joint in the body of a mammal. As with most other joints, synovial joints achieve movement at the point of contact of the articulating bones.Structural and functional differences distinguish synovial joints from cartilaginous joints (synchondroses and symphyses) and fibrous joints (sutures, gomphoses, and syndesmoses).ynovial joints contain the following structures: 1  Synovial cavity: all diarthroses have the characteristic space between the bones that is filled with synovial fluid.