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Transcript of human skeleton
Skeleton Division and Components
Different skeletons in comparison
Hi, I'm Ernesto
The human being has a skeletal system composed of more or less 270 bones.
It can be divided into two part: the axial skeleton and the appendicular skeleton.
Functions: support, movement, protection, production of blood cells, storage of ions and endocrine regulation.
-Decrease in bone mass and density caused by the formation of 'pores' within the bones that reduce the mass and therefore make them very fragile.
- Contains collagen and calcium phosphate Two types: compact or spongy
- composed of cells (chondrocytes) flexible support for certain structures
- band of connective tissue that connects muscles to bone
- a site where two or more bones are joined together
-The disease may be classified as primary type 1, primary type 2, or secondary.
Support: it mantains the shape's body
Movement: allowing by the joints
Protection: the skeleton protects our vital internal organs
Blood cell production: the haematopoeisis takes place in the bone marrow
Storage of calcium and iron
Endocrine regulation: release of a hormone called osteocalcin
man vs. woman
man vs. animal
Mass - man -> larger and heavier
- woman -> smaller and lighter
Limbs - man -> humerus, ulna, radius thicker and
longer lower limbs
pelvic - women -> shorter and more rounded
more flexible for child-birth
the skull - female or male?
1. Examine the features of the skull
2. Look to the temporal lines
3. Look me in the eyes
4. Underneath the arches
- forms a central axis
- protects numerous vital organs
- skull, hyoid, vertebral column, and thoracic cage
Osteogenesis imperfecta is an inherited genetic disease that causes an extreme bone fragility, so come also called bone disease of glass
The cause of bone fragility is a "competition" between cells (osteoblasts and osteoclasts)
- bones more
- less well
- vertical axis
- helps bodily movementand provides protection for organs of the digestive system , excretory system, and reproductive system
- body limbs and structures that attach limbs to the axial skeleton
- Bones of the upper and lower limbs, pectoral girdles, and pelvic girdle
- more curved
- 32 teeth
- babies are born with 300 bones, but when they grow the number reduces to 206;
- In the mornig, we are taller than in the evening;
- the jawbone is hardest and the most resistible bone of our body;
- the feet contain approximately one-quarter of all the bones of the body;