Human skeleton

skeletonskeletalskeletonshuman bonesskeletal systembone structurehuman bonebonebonesDifferences in male and female skeletal anatomy
The human skeleton is the internal framework of the human body.wikipedia
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Appendicular skeleton

appendicularextremities
The human skeleton can be divided into the axial skeleton and the appendicular skeleton.
Of the 206 bones in the human skeleton, the appendicular skeleton comprises 126.

Axial skeleton

axialaxial bonesaxial muscles
The human skeleton can be divided into the axial skeleton and the appendicular skeleton.
In the human skeleton, it consists of 80 bones and is composed of six parts; the skull (22 bones), the ossicles of the middle ear, the hyoid bone, the rib cage, sternum and the vertebral column.

Rib cage

ribsribcagefirst rib
The axial skeleton is formed by the vertebral column, the rib cage, the skull and other associated bones. The axial skeleton (80 bones) is formed by the vertebral column (32–34 bones; the number of the vertebrae differs from human to human as the lower 2 parts, sacral and coccygeal bone may vary in length), a part of the rib cage (12 pairs of ribs and the sternum), and the skull (22 bones and 7 associated bones). Without the rib cages, costal cartilages, and intercostal muscles, the lungs would collapse.
In humans, the rib cage, also known as the thoracic cage, is a bony and cartilaginous structure which surrounds the thoracic cavity and supports the shoulder girdle to form the core part of the human skeleton.

Skull

craniumcranialhuman skull
The axial skeleton is formed by the vertebral column, the rib cage, the skull and other associated bones. The human skeleton is not as sexually dimorphic as that of many other primate species, but subtle differences between sexes in the morphology of the skull, dentition, long bones, and pelvis exist. The axial skeleton (80 bones) is formed by the vertebral column (32–34 bones; the number of the vertebrae differs from human to human as the lower 2 parts, sacral and coccygeal bone may vary in length), a part of the rib cage (12 pairs of ribs and the sternum), and the skull (22 bones and 7 associated bones).
The human skull is the bony structure that forms the head in the human skeleton.

Hydroxyapatite

hydroxylapatitecalcium hydroxyapatitehydroxyapatites
However, bones are not entirely made of calcium, but a mixture of chondroitin sulfate and hydroxyapatite, the latter making up 70% of a bone.
Up to 50% by volume and 70% by weight of human bone is a modified form of hydroxyapatite, known as bone mineral.

Long bone

long boneslong
The human skeleton is not as sexually dimorphic as that of many other primate species, but subtle differences between sexes in the morphology of the skull, dentition, long bones, and pelvis exist.

List of bones of the human skeleton

human bonesbonesbones in the human body
The human skeleton of an adult consists of around 206 to 208 bones, depending on the counting of the sternum (which may alternatively be included as the manubrium, body of sternum, and the xiphoid process) It is composed of 270 bones at birth, but later decreases to 80 bones in the axial skeleton and 126 bones in the appendicular skeleton.

Leonardo da Vinci

Da VinciLeonardoLéonard de Vinci
Leonardo Da Vinci, among his many talents, also contributed to the study of the skeleton, albeit unpublished in his time.
Leonardo's anatomical drawings include many studies of the human skeleton and its parts, and of muscles and sinews.

Bone

cortical bonebone tissuecancellous bone
It is composed of around 270 bones at birth – this total decreases to around 206 bones by adulthood after some bones get fused together.

Shoulder girdle

pectoral girdlepectoralshoulder
The appendicular skeleton, which is attached to the axial skeleton, is formed by the shoulder girdle, the pelvic girdle and the bones of the upper and lower limbs.

Blood cell

blood cellshematopoietic cellhemocyte
The human skeleton performs six major functions; support, movement, protection, production of blood cells, storage of minerals, and endocrine regulation.

Sexual dimorphism

sexually dimorphicdimorphicdimorphism
The human skeleton is not as sexually dimorphic as that of many other primate species, but subtle differences between sexes in the morphology of the skull, dentition, long bones, and pelvis exist.

Morphology (biology)

morphologymorphologicalmorphologically
The human skeleton is not as sexually dimorphic as that of many other primate species, but subtle differences between sexes in the morphology of the skull, dentition, long bones, and pelvis exist.

Dentition

dental formuladental morphologydental
The human skeleton is not as sexually dimorphic as that of many other primate species, but subtle differences between sexes in the morphology of the skull, dentition, long bones, and pelvis exist.

Pelvis

pelvicpelvic girdlehip
The appendicular skeleton, which is attached to the axial skeleton, is formed by the shoulder girdle, the pelvic girdle and the bones of the upper and lower limbs. The human female pelvis is also different from that of males in order to facilitate childbirth.

Childbirth

laborbirthlabour
The human female pelvis is also different from that of males in order to facilitate childbirth.

Baculum

baculapenis boneos penis
Unlike most primates, human males do not have penile bones.

Rib

costalcostaerib cage
The axial skeleton (80 bones) is formed by the vertebral column (32–34 bones; the number of the vertebrae differs from human to human as the lower 2 parts, sacral and coccygeal bone may vary in length), a part of the rib cage (12 pairs of ribs and the sternum), and the skull (22 bones and 7 associated bones).

Hip

hip jointhipship-joint
The upright posture of humans is maintained by the axial skeleton, which transmits the weight from the head, the trunk, and the upper extremities down to the lower extremities at the hip joints.

Erector spinae muscles

erector spinaesacrospinalisback muscles
The erector spinae muscles are also supporting and are useful for balance.

Costal cartilage

costal cartilagesrib cartilageanterior costal cartilage grafts
Without the rib cages, costal cartilages, and intercostal muscles, the lungs would collapse.

Intercostal muscle

intercostalIntercostalesintercostals
Without the rib cages, costal cartilages, and intercostal muscles, the lungs would collapse.

Skeletal muscle

skeletal musclesskeletalmuscle
Movement is powered by skeletal muscles, which are attached to the skeleton at various sites on bones.

Agriculture

farmingagriculturalAgriculturist
Shifting from hunting to agriculture has caused human bone density to reduce significantly.