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human skeleton

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silvia galli

on 14 November 2014

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Transcript of human skeleton

Introduction and functions
Skeleton Division and Components
Different skeletons in comparison
Bibliography
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.
Components
Disorders
-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.
OSTEOGENESIS IMPERFECTA
OSTEOPOROSIS
• Bone
- Contains collagen and calcium phosphate Two types: compact or spongy


Cartilage
- composed of cells (chondrocytes) flexible support for certain structures

• Tendon
- band of connective tissue that connects muscles to bone


Joint
- 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
longer lower limbs

pelvic - women -> shorter and more rounded
more flexible for child-birth


Division
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

Axial Skeleton

- 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)



cranium
- smaller
brains
- bones more
curved
- horizontal
axis
- less well
developed
- vertical axis
- foramen
magnum
dentition
Appendicular Skeleton

- 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
- 2:1:2:3
- depends
on the
type of
animal
- 3:1:4:3
Curiosities
Silvia Galli
Elisa Rinaldi
Nicole Valerio
Sophie Prinoth

- 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;
http://en.wikipedia.org/wiki/Human_skeleton
http://en.wikipedia.org/wiki/Haematopoiesis
http://en.wikipedia.org/wiki/Bone_marrow
http://en.wikipedia.org/wiki/Bone_marrow
http://biology.about.com/od/organsystems/ss/skeletal-system.htm
Full transcript