(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.
There 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.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.
Cervical. The first seven vertebrae, all in the neck. These are smaller and lightly built. Thoracic. Twelve vertebrae, each articulating with the twelve pairs of ribs. Lumbar. The lower five vertebrae, between the ribs and the sacrum.These have the largest vertebral bodies. Each of the three segments of the spine has a curve. The cervical spine and the lumbar curve both are convex anteriorly, while the thoracic spine curves the opposite way, convex posteriorly.Each vertebra is shaped a bit like a wedge to support these curves, especially noticeable with the five lumbar vertebrae.he first seven vertebrae, all in the neck. These are smaller and lightly built. Thoracic. Twelve vertebrae, each articulating with the twelve pairs of ribs. Lumbar. The lower five vertebrae, between the ribs and the sacrum.