Anatomy of bone system. The manual for medical students / Анатомия костной системы. Учебное пособие для медицинских вузов

Human skeleton (frontal aspect):

1 – skull (cranium); 2 – vertebral column (columna vertebrale); 3 – clavicle (clavicula); 4 – IV rib (costa IV); 5 – sternum (sternum); 6 – humerus (humerus); 7 – ulna (ulna); 8 – radius (radius); 9 – carpal bones (ossa carpi); 10 – metacarpal bones (ossa metacarpi); 11 – phalanges of hand (ossa digitorum manus); 12 – ischium (os ischium); 13 – metatarsal bones (ossa metatarsi); 14 – tarsal bones (ossa tarsi); 15 – tibia (tibia); 16 – fibula (fibula); 17 – patella (patella); 18 – femur (femur); 19 – pubis (os pubis); 20 – ilium (os ilium)

The bones, together with their joints, form the skeleton of the human body.

It serves as a place for start and attachment of muscles, provides protection of visceral organs and also carries out the formbuilding and some other major functions.

1.1. Bone as an Organ

Bone, os, is an organ, which is a component of the musculoskeletal system. It hР°s a typical form and structure, specific architectonics of vessels and nerves, it is constructed mainly from osseous tissue covered with periosteum on the outside; periosteum containing inside bone marrow, medulla osseum.

Each bone has a certain shape, size and location in the human body. The conditions of bone development and functional loads which bones are subjected to in ontogenesis influence the morphogenesis of bones. Each bone has a certain number of blood supply sources (arteries), which have specific extra- and intraorganic architectonics.

Nervous structures of bones also have such features.

The bone is coated with periosteum on the outside, except the surfaces and places where articular cartilages are locted, and where muscles, tendons and ligaments are attached to the bone. The periosteum separates the bone from its surrounding tissues. It is a thin sheath of dense connective tissue which contains blood and lymphatic vessels and nerves. The nerves penetrate into the bone tissue from the periosteum.

The periosteum, periosteum, plays a major role in bone growth at thickness and in its nutrition. The osseous tissue is formed in the inner osteogenic layer of the periosteum. A bone lacking periosteum becomes inviable and necrotizes. The periosteum has a rich nerve supply, therefore it is very sensitive. During surgical operations, doctors try to maximally preserve the periosteum because of its very important role in reparative processes.