Our bodies are structurally supported by our bones. There are 206 bones in the skeleton of an adult human. These contain the ribs, arms, legs, vertebrae in the spine, and the skull. Specialized bone cells and calcium-reinforced connective tissue compose bones. Bone marrow, which is where blood cells are formed, is also found in most bones. Our body is secured together and allowed to move freely by the association of our bones, muscles, and joints. The musculoskeletal system is the term for this. The skeleton protects sensitive internal organs including the heart, brain, and lungs in addition to supporting and shaping the body.
Types of Skeletons in Human Body –
- Endoskeleton
- Exoskeleton
- Hydrostatic Skeleton
- Human Appendicular Skeleton
- Human Axial Skeleton
Bone types –
The human body contains a total of four types of bone:
- Long bone – Shaped like a long, thin bone. The bones of the arms and legs (except from the wrists, ankles, and kneecaps) are among the examples. Long bones function as levers to allow movement with the support of muscles.
- Short bone – cubed and squat in shape. The bones that comprise the ankles and wrists are two examples.
- Flat bone – A flat bone is one with a broad, level surface. Ribs, shoulder blades, breast bone, and skull bones are a few examples.
- Irregular bone – differs from the three categories listed above in terms of shape. The vertebrae of the spine are one example.
Let’s talk about the human body’s 206 bones-
Skull (Cranial Bones, Facial Bones, Ear Bones)
Cranial Bones
- Occipital bone
- Parietal bones – 2
- Frontal bone
- Temporal bones – 2
- Ethmoid bone
- Sphenoid bone
Facial Bones
- Maxillae – 2
- Nasal bones – 2
- Lacrimal bones – 2
- Palatine bones – 2
- Zygomatic bones – 2
- Inferior nasal concha – 2
- Mandible
- Hyoid Bone
- Vomer
Ear Bones
- Malleus – 2
- Incus – 2
- Stapes – 2
Chest
- Sternum – 1 or 3
- Ribs – 24, in pairs
- Cervical ribs – occur only in some people
Spine
- Cervical vertebrae – 7
- Thoracic vertebrae – 12
- Lumbar vertebrae – 5
- Sacrum – 5
- Coccyx – 1
Pectoral Girdle
- Clavicle – 2
- Scapula – 2
Arms
- Humerus – 2
- Radius – 2
- Ulna – 2
- Carpals – 16
- Phanages – 28
- Metacarpals – 10
Pelvic Girdle
- Hip bones – 2
Legs
- Femur – 2
- Tibia – 2
- Fibula – 2
- Patella – 2
- Tarsals – 14
- Phalanges – 28
- Metatarsals – 10
Particularly, an infant’s bone count starts at roughly 270 at birth and decreases to 206 by the time they are 21 years old because as bones merge together during time.
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