The thorax or chest is a part of the anatomy of humans, mammals, and other tetrapod animals located between the neck and the abdomen. Atlas (C1) The Atlas is the first cervical vertebra and therefore abbreviated C1. On the transverse processes of the thoracic vertebrae, there is a costal facet for articulation with the shaft of a single rib. a painful rupture of fibrocartilage of discs between spinal vertebrae. Each rib consists of a head, neck, and a shaft. Intercostal muscles and spaces are also interspersed between the visible rib fragments. 22. -Scapula -Humerus -First rib -Sternum and more.

each rib articulates at tw o places one on body of vertebrae one on transverse process Lum bar (5): short and thick spinous processes m odified for attachm ent of pow erful back m uscles Sacrum (5 fused): triangular bone form ed from fused vertebrae Human Anatomy & Physiology: Skeletal System; Ziser, Lecture Notes, 2010.4 14 tubercle. To further lighten the skeleton, several of the larger bones, and even some of the vertebrae in the spine, are connected directly or indirectly to the airways, and are said to be pneumonised.

Injury to the vertebrae and/or intervertebral disc at the C6-C7 level is a common source of C7 radicular nerve pain. In 1708, the Swiss naturalist Johann Jakob Scheuchzer described two ichthyosaur vertebrae assuming they belonged to a man drowned in The neck attaches the head to the shaft. System: Skeletal (Axial) Region: Pelvis This vertebra supports the skull. 24. Inferiorly, C1 articulates with the C2 vertebra, and so on. 3, 4, 6 Severe trauma to this level may also injure the spinal cord. ; There are twelve pairs of ribs. Each rib articulates posteriorly with two thoracic vertebrae by the costovertebral joint. The sacrum (plural: sacra or sacrums), in human anatomy, is a large, triangular bone at the base of the spine that forms by the fusing of the sacral vertebrae (S1S5) between ages 18 and 30.. The costocorporeal joints articulate with the costal facet of a single vertebra at T1, T10 and T11. In insects, crustaceans, and the extinct trilobites, the thorax is one of the three main divisions of the creature's body, each of which is in turn composed of multiple segments.. The sternum or breastbone is a long flat bone located in the central part of the chest.It connects to the ribs via cartilage and forms the front of the rib cage, thus helping to protect the heart, lungs, and major blood vessels from injury. C1 is termed the Atlas and C2 the Axis. Pathologies: Ankylosing spondylitis, herniated disc. C1 and C2 form a unique set of articulations that provide a great degree of mobility for the skull. (not heart-shaped) and lipped (uncinate process up top on each side). The costovertebral joint has two articulations between the rib and the vertebral column.

Costovertebral joints anchor the ribs to the thoracic cage through articulations between each rib and its adjacent thoracic vertebrae. The jugular (suprasternal) notch is the thickest part of the manubrium and is convex anteriorly and concave posteriorly. The skull of aetosaurs is relatively small compared to the body, and is quite distinctive in shape. Most marsupials have thirteen, but koalas only have eleven.

Sets with similar terms. The costocorporeal joint is where the rib head connects with two adjacent vertebral bodies and the disc between them. D. Tubercle. head. Below these are the 12 thoracic vertebrae, designated T1T12. C3 through C7 are known as "typical" cervical vertebrae. The sacrum includes the sacral vertebrae (S01-S05); these are the 25th through 29th of the 33 vertebrae of the vertebral column. The first seven stacked bones of the neck or cervical spine; labeled as C1 through C7. C1 serves as a ring or washer that the skull rests upon and articulates in a pivot joint with the dens or odontoid process of C2. The first rib articulates with the T1 vertebra only and the lowest three ribs articulate only with their own vertebral body. Superiorly, the C1 vertebra articulates (forms a joint) with the occipital condyles of the skull. Cervicitis . Each vertebra has a facet on each side of the vertebral body, which articulates with the head of a rib. One type of costovertebral joints called the joints of head of rib (or costocorporeal joints) unite the head of ribs with the costal facets of two adjacent vertebral bodies (T2-T9), one superior and one inferior. Its appearance is different from the other spinal vertebrae. The ribs are the bony framework of the thoracic cavity. The sternum (or breastbone) is a flat bone located at the anterior aspect of the thorax.It lies in the midline of the chest and has a T shape. The teeth which are present are usually small and bulbous, ranging from basic conical forms to leaf-like shapes with large serrations. Each rib has a dorsal segment known as the thoracic rib, and a ventral segment, or sternal rib. The thoracic cage takes the form of a domed bird cage with the horizontal bars formed by ribs and costal cartilages. Skull: A human skull consists of 28 different bones, and is divided into two main parts called the cranium and facial bones. They are numbered to match the vertebrae they attach to one to twelve, from top (T1) to bottom. The thoracic cage, also known as the rib cage, is the osteocartilaginous structure that encloses the thorax.It is formed by the 12 thoracic vertebrae, 12 pairs of ribs and associated costal cartilages and the sternum.. Head. When you think of the thoracic region, the first thing that comes to mind is the rib cage. Sacrum. The posterior surface, at the base, articulates with the sacrum by a fibrocartilage joint. The manubrium of the sternum is located anteriorly, articulating with the clavicle and the first rib. For example, the head of Rib 2 articulates with the inferior demi facet of thoracic vertebra 1 (T1) and the superior demi facet of T2, while the shaft of Rib 2 articulates with the costal facets of T2. C. Costal groove. In this article, we shall look at the osteology of the sternum its constituent parts, articulations,

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Similarly, the tubercle of the rib articulates with the transverse process of the vertebra and is a plane synovial joint. Lhuyd thought that they represented fish remains.

It rests on the oval window, to which it is connected by an annular ligament and articulates with the incus, or anvil through the incudostapedial joint. B. The superior facet articulates with the head of the adjacent rib, and the inferior facet articulates with the head of the rib below. It is supported by the vertical sternum The number of thoracic vertebrae varies considerably across the species.

The odontoid process is a part of which bone. The ribs form the main structure of the thoracic cage protecting the thoracic organs, however their main function is to aid respiration. The human thorax includes the thoracic cavity and the thoracic wall.

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Cervical spondylosis. The sacrum situates at the upper, back part of the pelvic cavity, between the two wings of the pelvis.It forms joints with four other bones. The stapes is the third bone of the three ossicles in the middle ear and the smallest in the human body. -Humerus -First rib -Scapula -Sternum, Identify the bone that articulates with the clavicle laterally. Also called arthritis of the neck, cervical spondylosis, is the wear and tear changes of the bones, discs, and joints of the neck. All ribs are attached posteriorly to the thoracic vertebrae.

The head only articulates with the body of the T1 vertebra and therefore only one articulatory surface is present. The superior surface is unique in that it is marked by two grooves that They are positioned so that the superior demifacet of inferior vertebrae articulates with the head of the same rib that articulates with the inferior demifacet of a superior rib. a true rib is attached to cartilage that directly articulates with the sternum. 6. A part of the rib that articulates with the body of the thoracic vertebrae. Lab 9 Os sacrum. Like all of its spinal counterparts, T11 protects the spinal cord by encasing it in bone. Hinge: essentially monoaxial that move freely in one plane (elbow, knee, finger, and toe joints) 6. The vertebral column, also known as the backbone or spine, is part of the axial skeleton.The vertebral column is the defining characteristic of a vertebrate in which the notochord (a flexible rod of uniform composition) found in all chordates has been replaced by a segmented series of bone: vertebrae separated by intervertebral discs. Thoracic Vertebrae. Acetabulum: The concave lateral portion of the sacrum that articulates with the head of the femur. The spinal column is the bodys main upright support. C2, the axis, articulates superiorly with C1 by a unique bony structure called the dens or odontoid process. Axis. The rib cage lies in the thoracic region of the body, and the thoracic vertebrae have a slight modification in order to articulate with the ribs. Inferiorly, the vertebral column articulates with the pelvis at sacroiliac joints. The Occiput (CO), also known as the Occipital Bone, is a flat bone that forms the back of the head.

The joint of head of rib (costocorporeal joint) is the articulation between the rib head and vertebral body. Parts of rib. Teeth are absent from both the front of the premaxilla (the bone forming the tip of the snout) and the front of the dentary (the toothed bone of the lower jaw). It measures roughly 2 to 3 mm, greater along the head-base span. The manubrium is quadrangular and lies at the level of the 3rd and 4th thoracic vertebrae. There are two types of ligaments: intra-articular ligament - attaches the intervertebral disc to the ridge in between the two facets of the head of the rib. The head of the rib is the end part closest to the vertebra with which it articulates. 4. -Collarbone -Shoulder blade -Rib -Breast bone, Identify the bone that articulates with the clavicle medially.

There is also a facet on each of the transverse processes which articulates with the tubercle of a rib. They are connected by anterior and posterior limbs (Latin: crura). C. 20. Infectious or noninfectious swelling or inflammation of the cervix. A; Abdomen: The belly or under surface between the chest and the hindquarters. The answer is B, head. As in the typical ribs, the tubercle has a facet for articulation with the transverse process of vertebrae. Since the ribs of the thoracic cage are oriented inferiorly, portions of the second, third and fourth ribs are visible around the contour of the lungs. Sternum/Breastbone: This is one flat bone that anchors the ribs, and together the sternum and ribs comprise the rib cage. C3-C7 are more classic vertebrae, having a body, pedicles, laminae, spinous processes, and facet joints. Study with Quizlet and memorize flashcards containing terms like Identify the common name for the clavicle. How many individual ribs are there in the average human skeleton? A part of the rib that articulates with the transverse process of the thoracic vertebrae. B. There are 12 thoracic vertebral bones, referred to as T1 T12.

Plane (gliding): bone surfaces flat, adjacent bones slide over one another (articular processes of the vertebrae) 5.

It projects up from the vertebral body and articulates with the atlas. The vertebrae themselves are numbered in descending order, and T1 is located at the top of the thoracic spine. In the majority of the vertebrae joints are formed by the articulation of transverse processes of a thoracic vertebra and the tubercle of the adjacent rib.

The first rib is the widest, shortest and has the sharpest curve of all the ribs. Early finds. The dens permit pivoting motion and allow a greater range of motion in rotating the head laterally. The manubrium articulates with the clavicles, the first ribs and the superior part of the second costal cartilages. It is located beneath, and articulates with, the seventh cervical vertebra (C7). Ribs: It contains 24 bones forming 12 pairs of ribs, which are further divided into true and false ribs. it may cause compression on the spinal cord leading to pain/ possible paralysis. supports the head; allows a rocking motion in conjunction with the occipital condyles. The head of the rib articulates with the cranial and costal facets of the adjacent vertebrae and is a ball and socket synovial joint. First rib. Cervical vertebrae . Individual vertebrae are named according to A. The head of the rib is on the posterior extremity, and it articulates with vertebrae via two facets, which are separated by a bony crest. The first known illustrations of ichthyosaur bones, vertebrae, and limb elements were published by the Welshman Edward Lhuyd in his Lithophylacii Brittannici Ichnographia of 1699. Vertebrae are stacked on top of one another to create the spinal column. As part of the bony thoracic wall, the sternum helps protect the internal thoracic viscera such as the heart, lungs and oesophagus.. They are present in all vertebrae except T11 and T12.