Which bones are roughly cube shaped

Long Bones A long bone is one that is cylindrical in shape, being longer than it is wide. Keep in mind, however, that the term describes the shape of a bone, not its size.

Long bones are found in the arms humerus, ulna, radius and legs femur, tibia, fibula , as well as in the fingers metacarpals, phalanges and toes metatarsals, phalanges. Long bones function as levers; they move when muscles contract. A short bone is one that is cube-like in shape, being approximately equal in length, width, and thickness.

The only short bones in the human skeleton are in the carpals of the wrists and the tarsals of the ankles. Short bones provide stability and support as well as some limited motion. Examples include the cranial skull bones, the scapulae shoulder blades , the sternum breastbone , and the ribs.

Flat bones serve as points of attachment for muscles and often protect internal organs. An irregular bone is one that does not have any easily characterized shape and therefore does not fit any other classification. These bones tend to have more complex shapes, like the vertebrae that support the spinal cord and protect it from compressive forces.

Many facial bones, particularly the ones containing sinuses, are classified as irregular bones. A sesamoid bone is a small, round bone that, as the name suggests, is shaped like a sesame seed. These bones form in tendons the sheaths of tissue that connect bones to muscles where a great deal of pressure is generated in a joint. It also consists of the joints , cartilage , tendons , and ligaments that connect them.

The human skeletal system is divided into two principal subdivisions: the axial and appendicular skeleton. The axial skeleton forms the central axis of the human body and is composed of 80 bones that include the bones of the skull, the ossicles of the middle ear, the hyoid bone of the throat, the vertebral column, and the thoracic cage. It also provides protection and support for the brain, spinal cord, and vital organs, in addition to providing a surface for muscles to attach to.

The appendicular skeleton consists of bones that include both the upper and lower limbs and bones of the shoulders and pelvis. The skeletal system is composed of four main fibrous and mineralized connective tissues : bones, ligaments, tendons, and joints.

Bone: A rigid form of connective tissue that is part of the skeletal system of vertebrates and is composed principally of calcium. Ligament: A small band of dense, white, fibrous elastic tissue.

Ligaments connect the ends of bones together in order to form a joint. They also assist in holding organs in place. Tendon: A tough, flexible and inelastic band of fibrous connective tissue that connects muscles to bones. Joint: Joints hold the skeleton and support movement. They can be grouped together by function and structure, such as ball-and-socket, hinge, and pivot joints. There are five types of bones in the human skeletal system: long, short, flat, irregular, and sesamoid.

Long bone: Helps to facilitate movement and support the weight of the body. Long bones are characterized by a long tubular shaft and an articular surface at each end of the bone where ligaments and tendons attach. These bones include the major bones of the arms and legs such as the humerus and femur, tibia and fibula, and the radius and ulna.

Short bone: Helps to provide stability and movement within the ankle and wrist joints. They provide little to no movement. The bones of the body come in a variety of sizes and shapes. The four principal types of bones are long, short, flat and irregular.

Bones that are longer than they are wide are called long bones. They consist of a long shaft with two bulky ends or extremities. They are primarily compact bone but may have a large amount of spongy bone at the ends or extremities.