Functions Of Bone

Your bones are more than a structure. They are highly evolved dynamic organs, capable of functions such as protection, movement, and mineral storage.6,7
Below are some of its functions in brief:

3D model of the human skeleton

Structural Support

Bones offer support for internal structures. They bear the weight of your body and enable an upright posture.6,7 

3D model of human rib cage & heart

Organ Protection

Your sturdy bones along with muscles protect the delicate internal organs, which would otherwise be prone to injury.6

Graphic of a running man

Physical Activity

Your bones are highly evolved structures that perform diverse mechanical functions.8 The counterforce offered by the bones to a contracting muscle is what initiates the locomotion.9 A combined effort of bone and skeletal muscle is needed to perform any form of physical activity.6

Illustration on bone protection with minerals & vitamins

Storage Warehouse

Up to 70% of the bone weight is made of minerals; calcium is the most abundant mineral accounting for 99% of the body’s mineralized tissues.10 Bones act as a calcium warehouse, allowing nerves and muscles to function properly.6 The human body cannot produce calcium. Its only source of calcium is diet or nutritional supplements. In case your body does not absorb an adequate amount of calcium, your bones may become weak.11 

Illustration of blood cells

Blood Cell Production

Most of your bones have a soft, spongy tissue called bone marrow, which is responsible for the production of blood cells. Bone marrow has many blood vessels and has two types of cells. 

  • The red marrow cells are responsible for the production of blood cells (RBC, WBC, and platelets)
  • The yellow bone marrow is composed of fat cells.12
3D model of human pelvis

Energy Source

Did you know there are more than just minerals in your bones? Your bones have bone marrow adipose tissues, which not only act as an energy reservoir for the body but also contribute to immune function and other bodily processes.13 

Bone Types

Your body consists of four types of bones and each type of bone has a distinctive shape and function.14

 The different types of bones include:

Thus, bones are unique connective tissues that perform several vital functions, including support, mobilization, and protection of internal organs.1

Illustration of the humerus bone

Long Bones14

Long bones are thin, long cylindrical bones and are present in the arms and legs. They function as ‘levers’ that move when the muscles contract.

Illustration of palm bones

Short Bones14

Short bones have approximately equal dimensions (length, width, and thickness), and usually appear cuboid in shape. The wrist (carpals) and ankle (tarsals) contain short bones.

Illustration of the rib cage

Flat Bones14

Flat bones have a thin, flattened, and slightly curved structure. They are present in the skull (cranium), and ribs.

Illustration of the vertebrae

Irregular Bones14

Irregular bones have a complex shape. One of the examples of irregular bones is vertebrae (spine).