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.
The six synovial joints are: 2. Saddle joints: These joint surfaces resemble a saddle and allow side to side and back and forth movements. An example is the thumb joint shown adjacent between a carpal bone known as the trapezium and the first metacarpal.. Pivot joints: These joints allow only one type of movement, the rotation of one bone on or around another. An example of a pivot joint is the joint between the atlas and axis (C1 & C2) vertebrae, the rotation around each other allows our heads to âpivotâ left and right. 5.