Bones of man

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Illustration of the human skeleton by Gerard de Lairesse in Govard Bidloos Ontleding des Menschlyken lichaams from 1685

The skeleton of the people there (apart from congenital variations such as cervical ribs and mergers) according to sources from 206 to 212 regular bone that up to half a meter can be large of a few millimeters, and all have a function. The weight of the bone mass is ten to 15 percent of a person of normal weight . Together they form the skeleton. Depending on their shape, human bones are divided into the following groups:

  • Ossa longa or tubular bones such as the arm and leg bones
  • Ossa plana or flat bones such as the sternum and ribs
  • Ossa brevia short, compact bones such as the carpal and metatarsal bones
  • Ossa pneumatica or air-containing bones such as the upper jaw
  • Ossa sesamoidea or sesamoid bones such as the kneecap

Infants have over 300 bones, some of which will grow together over time.

skull

The human skull

hull

The hull

Upper extremity

Shoulder girdle

Arm (membrum superius)

Hand ( manus )

The bones of the hand
  • The hand is made up of 27 bones.
    • The wrist ( carpus ) consists of eight bones ( Ossa carpi ; Mnemonic: A barge that travels in the moons shining in the triangle around the pea leg . Polygon size , polygon small - on the head , there must a hook to be.)
    • The metacarpal has five metacarpal bones ( ossa metacarpi , numbered I – V).
      • Two sesamoid bones ( ossa sesamoidea ) in the metacarpal-finger joint (metacarpophalangeal joint) of the thumb
    • The fingers each consist of three bones, the phalanges (phalanx proximalis, phalanx media, phalanx distalis , numbered I – V), the thumbs (I) consist of only two ( phalanx proximalis and phalanx distalis )

Lower extremity

Hip ( coxa )

leg

Foot (pes)

The foot bones

The foot is made up of twenty-six bones. The tarsus ( tarsus ) consists of seven bones.

Key point: the talus and the calcaneus , who wanted the barge in, and made war three times wedges from the cuboid bone .
  • Five metatarsal bones ( ossa metatarsi , numbered I – V)
    • Two sesamoid bones ( Ossa sesamoidea ) in the metatarsophalangeal joint of the big toe
  • The toes each consist of three bones ( phalanx proximalis, media, et distalis , numbered I – V), the big toes (I) only consist of two bones.

Accessory bones

In addition, there are a number of bones and varieties that occur only in a small portion of the population, the accessory bones . These include:

See also

Web links

Commons : Human Bones  - Collection of Pictures, Videos and Audio Files

Individual evidence

  1. ↑ Daniel D. Chiras: Human Body Systems . Jones & Bartlett Publishers, May 29, 2012, ISBN 978-1-4496-4793-3 , p. 91.
  2. ^ Rainer Flindt: Amazing Numbers in Biology . Springer Science & Business Media, December 21, 2006, ISBN 978-3-540-30147-9 , p. 208.