Categories: Anatomy

A Quick and Easy Overview of Human Skeleton

Human skeleton

The human skeleton is an internal structure of the human body. It is made up of around 270 bones at birth this total drops to about 206 bones by adulthood afterward some bones get fused.

To which age your bone continues to grow?

  • The mass of the bone in the skeleton reaches its maximum density about age 21.

Distribution of human skeleton

The human skeleton is further distributed into

Axial skeleton.

The axial skeleton is made by the

  • Rib cage
  • Vertebral column
  • Skull
  • Other associated bones.
  • The standing posture of the humans is conserved by the axial skeleton, which conveys the weight starting from the head, the trunk, and the upper extremities below towards the lower extremities at the hip joints. The spine bones are maintained by numerous ligaments. The erector spinae muscles are also supportive and are valuable for balance.

Appendicular skeleton (126 bones)

The appendicular skeleton that is attached to the axial skeleton is formed by

  • Shoulder girdle
  • Pelvic girdle
  • Bones of the upper limbs
  • Bones of lower limbs.
  • Their functions are to produce locomotion probable and to defend the main organs of digestion, excretion, and reproduction.

Functions of the human skeleton

The human skeleton accomplishes six major functions;


The skeleton is responsible for the framework which supports the whole body and maintains its exact shape.


The joints amongst bones permit movement, some permitting a broader range of movement than others, e.g. the ball and socket joint permits a better range of movement than pivot joint which is present at the neck.

Movement is driven by skeletal muscles, which are combined to the skeleton at numerous sites on bones.

Muscles, joints, and bones provide the main mechanism for movement, all these are synchronized by the nervous system


The skeleton assistances to defend our many vital inner organs from being injured.

  • The vertebrae defend the spinal cord.
  • The skull defends the brain.
  • The spine, rib cage, and sternum defend the lungs, heart and most important blood vessels.

Production of blood cells

The skeleton is the place of hematopoiesis, the formation of blood cells that occur in the bone marrow.

In kids, hematopoiesis occurs chiefly in the bone marrow of the long bones such as the tibia and femur

Ingrown person, it happens chiefly in the cranium, pelvis, vertebrae, and sternum

Storage of minerals

The bone matrix also able to store calcium and is involved in calcium metabolism

Bone marrow can store iron in ferritin and is involved in iron metabolism.

Endocrine regulation.

Bone cells discharge a hormone called osteocalcin, which involved the regulation of blood sugar and fat deposition.

Osteocalcin upsurges both insulin secretion and sensitivity, in addition to increasing the amount of insulin-producing cells and decreasing stores of fat.

Difference between sexes

The human skeleton stands not like sexually dimorphic like many extra primate species, but delicate differences among sexes found in

  • Morphology of skull
  • Dentition
  • Long bone
  • Pelvis exist.
  • Female skeletal elements are likely to be reduced and less vigorous than equivalent male elements.
  • The human female pelvis is also dissimilar from that of males to ease childbirth.
  • Different most primates, human menfolk do not have penile bones.

you may also want to read this

A Quick Overview of skeletal muscle

How Bones are Made Of?

Nearly every bone in your body is composed of similar materials:


  • The outer surface of the bone is named the periosteum.

It’s a tinny, dense membrane that encloses nerves and blood vessels that nurture the bone.

Compact bone

  • The subsequent layer is prepared with compact

This part is very smooth and hard. It’s the portion you see when you look at a skeleton.

Cancellous bone

  • Inside the compact bone are numerous layers of cancellous bone, which appearances a bit similar to a sponge. Cancellous bone is not quite as firm as compact bone, but it is still very strong.

Bone marrow

In numerous bones, the cancellous bone protects the deepest part of the bone, the bone marrow.

Bone marrow is kind of like a thick jelly, and its occupation is to create blood cells

Clinical significance

There are numerous skeletal disorders. A Single of the most common disorder is osteoporosis.

A side-to-side arc in the back or spine. This disorder is most ostensible during puberty and is best common with females.


It is a disorder of bone


It is a disorder of joint

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