Multiple Choice
You are shown an image of a cross section of a bone. You decide it is likely a flat bone based on the structure. Without seeing the overall shape of the bone, how could you tell?
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6. Bones & Skeletal Tissue
Gross Anatomy of Bone: Short, Flat, and Irregular Bones
2:11 minutesProblem 7c
Textbook Question
Classify the bones in the following diagram according to their shape.
c. _____
Verified step by step guidance1
Step 1: Identify the bone labeled (c) in the diagram, which is a section of the skull.
Step 2: Recall the classification of bones by shape: long bones, short bones, flat bones, irregular bones, and sesamoid bones.
Step 3: Understand that flat bones are typically thin, flattened, and often curved, providing protection and broad surfaces for muscle attachment. The skull bones, including the section labeled (c), fall into this category.
Step 4: Confirm that the bone labeled (c) is a flat bone because it is part of the skull, which protects the brain and has a broad, flat shape.
Step 5: Conclude that the bone labeled (c) should be classified as a flat bone.
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Video duration:
2mKey Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Bone Classification by Shape
Bones are classified into four main shapes: long, short, flat, and irregular. This classification helps in understanding their function and location in the body. For example, long bones like the humerus support weight and facilitate movement, while flat bones like the parietal bone protect internal organs.
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Structural Joint Classifications
Long Bones
Long bones are characterized by a shaft and two ends, primarily composed of compact bone. They are longer than they are wide and function mainly in support and movement. The humerus, shown in the diagram as (a), is a typical example of a long bone.
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Irregular Bones
Irregular bones have complex shapes that do not fit into other categories. They often have specialized functions such as protection of nervous tissue or providing multiple anchor points for muscles. The vertebra (d) in the diagram is an example of an irregular bone.
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2:58Short, Flat, and Irregular Bones
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