(mÃ»r'kyÉ-rÄ) Symbol Hg. A silvery-white, dense, poisonous metallic element that is a liquid at room temperature and is used in thermometers, barometers, batteries, and pesticides. Atomic number 80; atomic weight 200.59; melting point -38.87Â°C; boiling point 356.58Â°C; specific gravity 13.546 (at 20Â°C); valence 1, 2. See Periodic Table.
Types of vertebra? Vertebrae are divided into sections: the atlas and axis account for the first cervical vertebrae, of which there are 7 in total; there are 12 thoracic vertebrae, 7 lumbar vert â¦ ebrae, 1 sacrum (5 separate vertebrae in a baby), and 1 coccyx (4 separate vertebrae in a baby).here are Five different types of Vertebrae in the Vertabral collumn (spine). 1) Cervical Vertebrae (7) 2) Thoracic Vertebrae (12) 3) Lumbar Vertebrae (5) 4) Sacral Ve â¦ rtebrae (5) 5) Coccygeal Vertebrae (3). + 33 others found this useful. Yerroh Jalloh.
Interbody Fusion. An inter-body fusion technique removes the disc from between the vertebrae that will be fused together. The discs are then replaced with a bone spacer made of either metal or plastic. There are three main types of inter-body fusion techniques. The posterior lumbar interbody fusion (PLIF) technique is performed through an incision in the back (hence, the posterior position) and is usually done when either a single fusion of two vertebrae or a double fusion, which involves three vertebrae, is required.