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1. By Noelia,Diego, Gema and Dani

2.  Bones are organs formed by a very hard tisue.
 Inside them, there are different things: first, the hard bone, covering the sponged
bone, which, in the case of the large bones, it contains inside the bone marrow.
 In the bone marrow all the blood cells are produced!

3. The bones take part in 2 body tasks:
1. Sustain the body
2. Protect some organs, like the brain, heart and lungs.
They also help us to walk and move.

5. Differences between the shape
and thickness, permit us clasiffy
the bones.
LARGE BONES
Femur
PLAIN BONES
Cranium
SHORT BONES
Fingers´ bones
SESAMOIDEUMS
BONES
Ball Joint

6.  All the bones together, joined with ligaments form the skeleton.
 SKELETON PARTS
 To divide the skeleton, we can see 3 main parts:
 Axial part: formed by the neck bones and the Cranium.
 Trunk part: formed by the ribs cage and the superior limbs.
 Low part: formed by the lower limbs. It´s join to the truk part by the pelvis.

7.  Animal bones can support more weight tan a human bone.
 While we sleep intervertebral discs expand and while we are awake they smash, so
we grow like 1 centimetre while we sleep and un-grow while we´re awake!
 The largest bone is the femur.
 Some people can born with an extra rib.