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Learn about the bones, muscles, skin, teeth, mouth, and other structures of the head and neck region of the human body. This article covers the anatomy, function, and clinical aspects of the head and neck.
The human musculoskeletal system, also known as the human locomotor system, is the organ system that gives humans the ability to move using their muscular and skeletal systems. It consists of bones, muscles, cartilage, tendons, ligaments, joints, and other connective tissue that support, stabilize, and enable movement of the body.
Cervical vertebrae are the vertebrae of the neck, consisting of seven bones, from C1 to C7. C1 (atlas) and C2 (axis) are the topmost vertebrae, forming the joint connecting the skull and spine. Learn about their anatomy, clinical significance, and landmarks.
The hyoid bone (Latin os hyoideum) is a horseshoe-shaped bone in the neck that is not attached to any other bones. It supports the tongue, larynx and pharynx and varies in shape and size among humans and animals.
The nuchal ligament is a ligament at the back of the neck that connects the skull and the seventh cervical vertebra. It is present in some animals that run, such as dogs and horses, and is also called paddywhack or paxwax in the meat industry.
Learn about the bones, ligaments, and tendons of the horse, and how they function and support the body. The skeletal system of the horse consists of 205 bones, divided into axial and appendicular skeleton, and various categories of bones.
The radius is a long bone in the forearm that articulates with the humerus, ulna, and carpal bones. It has a head, neck, tuberosity, body, and lower extremity with various surfaces and grooves for muscle attachments and ligaments.
The atlas (C1) is the first cervical vertebra of the spine that supports the head and allows nodding and rotation movements. It has no body, but consists of an anterior and a posterior arch and two lateral masses with articular facets for the occipital bone and the axis.