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.
Synovial joints have a synovial cavity between the articulating bones. This cavity is filled with synovial fluid that reduces friction at the joint, enabling the articulating bones to move freely. The page about types of joints explains the 3 functional classes of joints: 1  synarthroses (immovable joints).rticulating bone(s). There are at least 2 bones forming each joint. An example of a simple synovial joint is the 3rd metacarpophalangeal (MCP) joint, which is formed by two articulating bones, the 3rd metacarpal and the 3rd proximal phalanx.