plural vertebrae -ˌbrā -brē -brə or vertebras. : one of the sections of bone or cartilage that make up the spinal column.
Where is L1 L2 on the spine?
The L1 vertebra is located in the spinal column of the lumbar (lower back) region inferior to the T12 vertebra and superior to the L2 vertebra. Like the other lumbar vertebrae, L1 has a large, roughly cylindrical region of bone known as the body, or centrum, which makes up most of its mass.
Where is L1 to L4 in the spine?
Your lumbar spine consists of the five bones (vertebra) in your lower back. Your lumbar vertebrae, known as L1 to L5, are the largest of your entire spine. Your lumbar spine is located below your 12 chest (thoracic) vertebra and above the five fused bones that make up your triangular-shaped sacrum bone.
What are the 3 parts of the vertebrae?
The spine itself has three main segments: the cervical spine, the thoracic spine, and the lumbar spine. The cervical is the upper part of the spine, made up of seven vertebrae (bones). The thoracic is the center portion of the spine, consisting of 12 vertebrae. The lower portion of the spine is called the lumbar spine.
What does Vertabrae mean? – Related Questions
What are the 7 vertebrae?
The cervical spine, comprised of seven cervical vertebrae referred to as C1 to C7, is divided into two major segments: the craniocervical junction (CCJ) and the subaxial spine. The CCJ includes the occiput and the two most cephalad cervical vertebrae, known as the atlas (C1) and the axis (C2).
What are the 33 vertebrae?
Vertebrae are the 33 individual bones that interlock with each other to form the spinal column. The vertebrae are numbered and divided into regions: cervical, thoracic, lumbar, sacrum, and coccyx (Fig. 2). Only the top 24 bones are moveable; the vertebrae of the sacrum and coccyx are fused.
What are the parts of the vertebra?
The vertebrae (back bones) of the spine include the cervical spine (C1-C7), thoracic spine (T1-T12), lumbar spine (L1-L5), sacral spine (S1-S5), and the tailbone. Each vertebra is separated by a disc. The vertebrae surround and protect the spinal cord.
What are the 3 main functions of the vertebrae?
The three main functions of the spine are to: Protect the spinal cord, nerve roots and several of the body’s internal organs. Provide structural support and balance to maintain an upright posture. Enable flexible motion.
What are the parts of a typical vertebrae?
A typical vertebra consists of a body and a vertebral arch. The arch is formed by the paired pedicles and paired laminae. Arising from the vertebral arch are the transverse, spinous, superior articular, and inferior articular processes. The vertebral foramen provides for passage of the spinal cord.
How can you distinguish these 3 main types of vertebrae?
The vertebrae are classified into sections – cervical, thoracic, lumbar, sacrum, and coccyx. The most significant difference between the cervical, thoracic, and lumbar vertebrae lies in their location. From where the skull starts, the cervical vertebrae constitute the first seven vertebrae.
What are the 3 spinal abnormalities?
Common adult spinal deformities are scoliosis, kyphosis, and lordosis.
- Kyphosis involves the upper back curving forward. The condition can create the form of a hump.
- Lordosis is also known as swayback.
- Scoliosis is a frontal deformity in which the spine, when viewed straight on, curves to the left or the right.
What are C2 C3 C4 and C5?
The C2-through-C5 spinal motion segments are located in the middle portion of the cervical spine. They include 3 separate spinal motion segments: C2 C3, C3 C4, and C4 C5. Each segment consists of 2 adjacent vertebrae and the anatomical structures connecting them.
What are the 12 vertebrates?
From top to bottom, the vertebrae are:
- Cervical spine: 7 vertebrae (C1–C7)
- Thoracic spine: 12 vertebrae (T1–T12)
- Lumbar spine: 5 vertebrae (L1–L5)
- Sacrum: 5 (fused) vertebrae (S1–S5)
- Coccyx: 4 (3–5) (fused) vertebrae (Tailbone)
What are the 5 names of vertebrates?
The phylum chordata (animals with backbones) is divided into five common classes: fish, amphibians, reptiles, mammals and birds.
What are the 6 classes of animals?
The six main taxonomic classes of animals are:
- Mammals.
- Birds.
- Reptiles.
- Amphibians.
- Invertebrates.
- Fish.
What are the 9 types vertebrates?
The 50,000 species of living vertebrates are placed in nine classes: hagfish, lampreys, cartilaginous fish, ray-finned fish, lobe-finned fish, amphibians, reptiles, birds, and mammals.
What are 5 organs found in most vertebrates?
In addition to the skeletal system, vertebrates have many other complex organ systems including a closed circulatory system with a ventral (bottom side) heart having two to four chambers, a respiratory system, a well-developed muscular system with a muscular mouth and pharynx, an excretory system, and an immune system.
What was the first vertebrate?
The earliest vertebrates were jawless fish, similar to living hagfish. They lived between 500 and 600 million years ago. They had a cranium but no vertebral column. The phylogenetic tree in Figure below gives an overview of vertebrate evolution.
What are 10 animals that are vertebrates?
Vertebrates- Animals with Backbones
- Fish (Gills, Fins, Scales, Cold Blooded)
- Amphibians (Slimy skin, Metamorphosis, Four Legs, Cold Blooded)
- Reptiles (Scales, Eggs, Four Legs, Cold blooded)
- Mammals (Hair, Milk, Live Birth, Warm blooded)
- Birds (Feathers, Beak, Eggs)
Who has no backbone?
Inverbrates are animals that lacks a vertebral column, or backbone. More than 90 percent of all living animal species are invertebrates. Some have soft bodies, like worms, slugs and jellyfish.