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The first vertebrates (as far as is known) were a group of extinct*, jawless, heavily-armored fishes called Ostracaderms. *There are a few zoologists who feel that the hagfish and possibly the lamprey and slime hag are ostracaderms, but I disagree. I'm not at all sure that the hagfish and slime hag are true vertebrates.
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What is another name for the C1 vertebra?
The first Cervicalvertebrae..............Neck...........................Altis
The first cervical vertebra is called the axis?
Actually, the first cervical vertebra is called the atlas, not the axis. The axis is the second cervical vertebra that forms a pivot joint with the atlas, allowing for rotation of the head from side to side.
Dens here provides a pivot for rotation of the first cervical vertebra?
Atlaswrong . the correct answer is axis (http://en.wikipedia.org/wiki/Axis_(anatomy)) "It forms the pivot upon which the first cervical vertebra (the atlas), which carries the head, rotates."
The transverse processes of the first cervical vertebra are also known as the?
The transverse processes of the first cervical vertebra (C1) are also known as the lateral masses. They are prominent bony structures that extend laterally from the sides of the vertebra and serve as points of attachment for muscles and ligaments.
What special name are given to 1st and 2nd cervical vertebra?
The first cervical vertebra is called the atlas, after the Greek mythological figure who held up the heavens. The second cervical vertebra is called the axis, as it allows the head to rotate from side to side.
Is spirostomum animal-like?
No, the spirostomum is a unicelluar organism so it has no vertebra.
Which cranial bone houses the condyles that articulate with first cervical vertebra?
The occipital condyles of the occipital bones articulate with the first cervical vertebra.
What is the dens odontoid process?
Since the dens is part of the Axis vertebra (and project up in the first vertebra, the Atlas vertebra that supports the skull) it is called the Dens Axis
What is the abbreviation for a damaged vertebra?
The abbreviation for a damaged vertebra is typically "Fx," which stands for "fracture." In medical contexts, you might see it used with a numeral to specify the affected vertebra, such as "L1 Fx" for a fracture of the first lumbar vertebra.
What is another name for the C1 vertebra?
The first Cervicalvertebrae..............Neck...........................Altis
Which vertebra articulates with the occipital bone?
The first cervical vertebra, called C1 or the atlas, articulates with the occipital bone.
The first cervical vertebra is called the axis?
Actually, the first cervical vertebra is called the atlas, not the axis. The axis is the second cervical vertebra that forms a pivot joint with the atlas, allowing for rotation of the head from side to side.
When the head is moved from side to side the first vertebra pivots around the?
When the head is moved from side to side, the first vertebra pivots around the second vertebra called the axis. This movement allows for rotation and flexibility of the neck.
When the head is moved from side to side the first vertebra pivots around the what of the second vertebra?
densThe Dens of the second Vertebrae.
The occipital articulates with the first vertebra at what location?
condyles
What class lever is a skull pivoting on a vertebra?
first
What location have a pivotal joint?
The skull to the first vertebra
