Human skeleton | Parts, Functions, Diagram, & Facts | Britannica
2024年10月23日 · human skeleton, the internal skeleton that serves as a framework for the body. This framework consists of many individual bones and cartilages. There also are bands of fibrous connective tissue—the ligaments and the tendons—in …
Human body | Organs, Systems, Structure, Diagram, & Facts
2024年11月12日 · Characteristic of the vertebrate form, the human body has an internal skeleton with a backbone, and, as with the mammalian form, it has hair and mammary glands. Learn more about the composition, form, and physical adaptations of the human body.
Bone | Definition, Anatomy, & Composition | Britannica
2024年10月29日 · Bone, rigid body tissue consisting of cells embedded in an abundant hard intercellular material. Bone tissue makes up the individual bones of the skeletons of vertebrates. Its two principle components are collagen and calcium phosphate. Learn more about the composition and function of bone.
Bone - Structure, Function, Types | Britannica
2024年10月29日 · Internal structure of a human long bone, with a magnified cross section of the interior. The central tubular region of the bone, called the diaphysis, flares outward near the end to form the metaphysis, which contains a largely cancellous, or spongy, interior.
The structure and functions of the human skeleton | Britannica
human skeleton, Internal skeleton that serves as a framework for the human body. It consists of many individual bones and cartilages; there also are bands of fibrous connective tissue (the ligaments and tendons) in intimate relationship with the parts of the skeleton.
Human muscle system | Functions, Diagram, & Facts | Britannica
2024年10月21日 · human muscle system, the muscles of the human body that work the skeletal system, that are under voluntary control, and that are concerned with movement, posture, and balance. Broadly considered, human muscle—like the muscles of all vertebrates—is often divided into striated muscle (or skeletal muscle), smooth muscle , and cardiac muscle .
Bone - Calcium, Phosphate, Hardness | Britannica
2024年10月29日 · Bone - Calcium, Phosphate, Hardness: Depending upon species, age, and type of bone, bone cells represent up to 15 percent of the volume of bone; in mature bone in most higher animals, they usually represent only up to 5 percent.
human skeleton: Facts & Related Content - Encyclopedia Britannica
Human skeleton, the internal skeleton that serves as a framework for the body. This framework consists of many individual bones and cartilages. There also are bands of fibrous connective tissue—the ligaments and the tendons—in intimate relationship with the parts of the skeleton.
Skeletal system parts and functions | Britannica
Human skeleton, the internal skeleton that serves as a framework for the body. This framework consists of many individual bones and cartilages. There also are bands of fibrous connective tissue—the ligaments and the tendons—in intimate relationship with the parts of the skeleton.
Human digestive system | Description, Parts, & Functions | Britannica
2024年10月25日 · The human digestive system is the series of structures and organs through which food and liquids pass during their processing into forms that can be absorbed into the bloodstream.