Quick Answer. Water droplets form on the outside of a glass of ice water due to condensation. The temperature of the glass is cold enough to cool down the water vapor in the surrounding air, so it turns from gas to liquid. Therefore, drops form more readily during warm weather than cold weather. Continue Reading
The vertebral column usually consists of 33 vertebrae: 24 presacral vertebrae (7 cervical, 12 thoracic, and 5 lumbar) followed by the sacrum (5 fused sacral vertebrae) and the coccyx (4 frequently fused coccygeal vertebrae).The 24 presacral vertebrae allow movement and hence render the vertebral column flexible.9-10 and 39-11). Five (sometimes six) vertebrae are fused in the adult to form the sacrum, which can be felt below the small of the back.. The sacrum articulates above with L5, laterally with the hip bones, and inferiorly with the coccyx.
Slightly movable. 1  1. Hinge joints allow only back and forth movement, (like the opening and closing of a door) such as bending and straightening, however at the same time the extent of movement is considerable (transverse axis). 2  3. Saddle joints permit side-to-side and back-and-forth movement.