The collarbone is a large doubly curved long bone that connects the arm to the trunk of the body. It is a flat, paired bone with an extensive surface for muscular attachment. - Definition, Types & Function, CSET Science Subtest II Physics (220): Test Prep & Study Guide, FTCE Earth & Space Science 6-12 (008): Test Practice & Study Guide, ILTS Science - Biology (105): Practice and Study Guide, UExcel Microbiology: Study Guide & Test Prep, NYSTCE Earth Science (008): Practice and Study Guide, M (ASCP) Technologist in Microbiology: Study Guide & Exam Prep, Prentice Hall Earth Science: Online Textbook Help, National Entrance Screening Test (NEST): Exam Prep, MTTC Integrated Science (Elementary)(093): Practice & Study Guide, Holt McDougal Earth Science: Online Textbook Help, Biology 101 Syllabus Resource & Lesson Plans, OSAT Physics (CEOE) (014): Practice & Study Guide, Biological and Biomedical it's not flat !! The clavicle or collar bone is a pair of long bones that join the pectoral girdle (appendicular skeleton) to the sternum (axial skeleton). - Function & Components, Pivot Joints in the Body: Types & Examples, Periosteum of Bone: Definition & Function, The Six Types of Synovial Joints: Examples & Definition, Functions of Red Blood Cells, White Blood Cells & Platelets, Cancellous Bone: Definition, Structure & Function, Isometric and Isotonic Contraction: Definition and Examples, What is Cartilage? From the roughly pyramidal sternal end, each collarbone curves laterally and anteriorly for roughly half its length. The anterior border is concave forward and posterior border is convex backward. answer! What is the... Primary ossification centers develop in long bones... Types of Joints & Joint Structures in the Body. The bones of the wrist and ankle are short bones. [7], In dinosaurs the main bones of the pectoral girdle were the scapula (shoulder blade) and the coracoid, both of which directly articulated with the clavicle. In most cases, the direct hit occurs from the lateral side towards the medial side of the bone. It is flat from above downward. The clavicle bone, also called the collarbone, is a flat bone which attaches on one end to the sternum, or breastbone, and on the other end to the scapula, or shoulder blade. Surely it cannot be both a long bone and a short bone? From the roughly pyramidal sternal end, each cla… The clavicle is a doubly curved short bone that connects the arm (upper limb) to the body (trunk), located directly above the first rib. It receives its name from the Latin clavicula ("little key") because the bone rotates along its axis like a key when the shoulder is abducted. is the lateral bone of the forearm. Although it is a long bone, the clavicle lacks an internal cavity (medullary cavity) where bone marrow would be housed in most long bones. The clavicle, or collarbone, is a slender, S-shaped bone approximately 6 inches (15 cm)[1] long bone that serves as a strut between the shoulder blade and the sternum (breastbone). Your scapula is a flat bone that’s commonly referred to as your shoulder blade. It functions as a part of the upper limb physiologically, because is involved in the movements of the arm. All rights reserved. The compact forms as the layer of fascia covering the bone stimulates the ossification of adjacent tissue. Discuss the structures within bones (fosa,meatus,... Is the tibia medial or lateral to the fibula? It runs just beneath the skins surface and is typically smooth. The place on the scapula where it articulated with the humerus (upper bone of the forelimb) is the called the glenoid. It is a touchable bone, and in people who have less fat in this region, the location of the bone is clearly visible, as it creates a bulge in the skin. In: Prentice WE. [6], The earliest tetrapods retained this arrangement, with the addition of a diamond-shaped interclavicle between the base of the clavicles, although this is not found in living amphibians. The most common type of fractures occur when a person falls horizontally on the shoulder or with an outstretched hand. Diagram of the human shoulder joint, front view, Diagram of the human shoulder joint, back view, Plain bone of short length that serves as a strut between the scapula and the sternum. However, it is one of the last bones to finish ossification at about 21–25 years of age. Bones are classified according to their shape, and can be long, flat, irregular, short and sesamoid. It is classed as a long bone and can be palpated along its length.In thin individuals, it is visible under the skin. In some people, particularly females who may have less fat in this region, the location of the bone is clearly visible as it creates a bulge in the skin. Even though it is classified as a long bone, the collarbone has no medullary (bone marrow) cavity like other long bones, though this is not always true. Option … This long, thin bone links your shoulder to your chest. For example, crocodilians and salamanders lack clavicles altogether (although crocodilians do retain the interclavicle), while in turtles, they form part of the armoured plastron. The levator claviculae muscle, present in 2–3% of people, originates on the transverse processes of the upper cervical vertebrae and is inserted in the lateral half of the clavicle. The lateral end is also known as the acromial end. The clavicle is a long bone of the body, not a flat bone. —Preceding unsigned comment added by 128.151.134.160 (talk) 06:34, 22 November 2010 (UTC) The article also describes the Clavicle as a short bone (first sentence, main section.) Its one end forms a joint with the sternum while the other end forms a joint with the scapula or the shoulder blade. Looking back at the diagram of the orange stick to show how flat the acromial end of the clavicle is, we can easily say that the clavicle has 2 surfaces and 2 borders. At its lateral end it articulates with the acromion of the scapula (shoulder blade) at the acromioclavicular joint. The scapula is a flat, triangular-shaped bone with a prominent ridge running across its posterior surface. In such fish, the paired clavicles run behind and below the gills on each side, and are joined by a solid symphysis on the fish's underside. It bears a facet that articulates with the shoulder to form the acromioclavicular joint. It receives its name from the Latin clavicula ("little key") because the bone rotates along its axis like a key when the shoulder is abducted.
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