The Sternum (breastbone), Cranium (skull), ilium (hip bone) Pelvis, and Ribs are also classified as flat bones. The classic example of a flat bone is the Scapula (shoulder blade). Flat Bonesįlat bones are as they sound, strong, flat plates of bone with the main function of providing protection to the body’s vital organs and being a base for muscular attachment. They consist of only a thin layer of compact, hard bone with cancellous bone on the inside along with relatively large amounts of bone marrow. Examples of short bones are the Carpals and Tarsals – the wrist and foot bones. Short bones are defined as being approximately as wide as they are long and have the primary function of providing support and stability with little movement. This protects it and aids shock absorptions. Hyaline cartilage covers the ends of the bone. The classification of a long bone includes having a body that is longer than it is wide, with growth plates (epiphysis) at either end, having a hard outer surface of a compact bone, and a spongy inner known as a cancellous bone containing bone marrow. Let knowledge be the cure.Long bones are some of the longest bones in the body, such as the Femur, Humerus, and Tibia but are also some of the smallest including the Metacarpals, Metatarsals, and Phalanges. Powered by django-wiki, an open source application under the GPLv3 license. This article was last modified: March 15, 2023, 5:22 p.m. Other muscles are used for smiling, yawning, and lots of facial expressions.įigure 1: The skull is made from flat bones. Some muscles allow us to open our mouths and bite down with force. Muscles attach to the skull at different locations. The combination of compact and spongy bone is important because flat bones have numerous muscle attachment points that pull in different directions, so they need to be able to withstand forces in different directions.įor example, the skull is made of flat bones and irregular bones. The hard outer layer provides protection from direct forces, while the spongy bone center allows these bones to absorb forces coming from different directions as well. Red bone marrow is contained within the spongy bone. These bones are constructed in a sandwich-like manner, with hard compact bone on the outside and spongy bone on the inside. The skull, ribs, and sternum are all made from flat bones. Flat bones are a type of bone that protects internal organs.
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