Human skeleton | Parts, Functions, Diagram, & Facts | Britannica
Feb 6, 2026 · The primary functions of the human skeleton are support, protection, and motion. Support is the most primitive and oldest function, while protection involves safeguarding organs, and motion …
Human body | Organs, Systems, Structure, Diagram, & Facts | Britannica
Jan 19, 2026 · Characteristic of the vertebrate form, the human body has an internal skeleton that includes a backbone of vertebrae. Typical of mammalian structure, the human body shows such …
Human skeleton - Arms, Legs, Joints | Britannica
Feb 6, 2026 · Human skeleton - Arms, Legs, Joints: The humerus and the femur are corresponding bones of the arms and legs, respectively. While their parts are similar in general, their structure has …
Rib cage | Anatomy & Function | Britannica
Jan 23, 2026 · The human skeleton has two main subdivisions: the axial skeleton, which includes the vertebral column and much of the skull, and the appendicular skeleton, which includes the pelvic and …
Human muscle system | Functions, Diagram, & Facts | Britannica
Feb 5, 2026 · This article is concerned with the skeletal muscles of the human body, with emphasis on muscle movements and the changes that have occurred in human skeletal musculature as a result of …
human skeleton Facts | Britannica
The human skeleton is the internal framework for the human body. It consists of many individual bones and cartilages, as well as bands of fibrous connective tissue—the ligaments and the tendons—which …
Pelvis | Definition, Anatomy, Diagram, & Facts | Britannica
Feb 13, 2026 · The pelvis, in human anatomy, is a basin-shaped complex of bones that connects the trunk and the legs, supports and balances the trunk, and contains and supports the intestines, the …
Australopithecus afarensis, 3.2 Million Years, Ethiopia - Britannica
Feb 20, 2026 · Lucy, nickname for a remarkably complete (40 percent intact) hominin skeleton found by American paleoanthropologist Donald Johanson at at the fossil site Hadar in Ethiopia on Nov. 24, …
Ardipithecus - Early Hominin, Fossil Evidence, 4.4 Million Years ...
The anatomy of Ar. ramidus is best understood by examining Ardi, the partial skeleton found at Aramis. This specimen preserves key details of the dentition, skull, forearm, pelvis, leg, and foot of a young …
Ardi | Discovery, Facts & Species | Britannica
Ardi, nickname for a partial female hominid skeleton recovered at Aramis, in Ethiopia’s Afar rift valley. Ardi was excavated between 1994 and 1997 and has been isotopically dated at 4.4 million years old.