Classify the bones in the following diagram according to their shape.
b. _____

Verified step by step guidance

1. Step 1: Identify the bone labeled 'b' in the diagram. It is the long bone shown on the left side of the skeleton, which appears to be a femur or humerus.
2. Step 2: Recall the classification of bones by shape: Long bones are longer than they are wide and primarily function as levers; Short bones are roughly cube-shaped and provide stability with little movement; Flat bones are thin and often curved, providing protection and broad surfaces for muscle attachment; Irregular bones have complex shapes that do not fit into the other categories.
3. Step 3: Analyze the shape of the bone labeled 'b'. It is elongated with a shaft and two ends, which is characteristic of a long bone.
4. Step 4: Confirm that the bone labeled 'b' fits the criteria of a long bone based on its length, shape, and function in the skeleton.
5. Step 5: Conclude that the bone labeled 'b' should be classified as a long bone.

Key Concepts

Bone Classification by Shape

Bones are classified into four main shapes: long, short, flat, and irregular. This classification is based on their shape and structure, which relates to their function in the body. For example, long bones are longer than they are wide and primarily support weight and facilitate movement.

Long Bones

Long bones, such as the femur shown in the image, are characterized by a long cylindrical shaft and two ends. They function mainly in support and movement, acting as levers for muscles. These bones are mostly found in the limbs.

Flat and Irregular Bones

Flat bones, like the parietal bone in the skull, are thin and often curved, providing protection and large surface areas for muscle attachment. Irregular bones, such as vertebrae, have complex shapes that do not fit other categories and serve specialized functions like protecting the spinal cord.