self immolation

Essay by cargeek47High School, 11th gradeB-, October 2014

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Name: _______________ The Skeletal System

Date: _______________ By Seamus & Nithin

The Skeleton:

Key Concept: The skeleton supports the body, protects internal organs, provides a site for blood cell information.

Bones provide a system of levers on which muscles act to produce _______________.

Bones are the sites of blood cell _______________; Blood cells are produced in the soft marrow tissue that fills the internal cavities in some bones.

There are 206 bones in the human body, which those are divided into 2 parts, the _______________ and the _______________.

Axial skeleton:

The axial skeleton supports the _______________ axis of the body.

It consists of the skull, the vertebral column, and the rib cage.

Appendicular skeleton:

The Appendicular skeleton consists of the bones from the _______________to the _______________, along with the pelvis and shoulder area.

The Structure of Bones:

Key Concept: Bones are a solid network of living cells and protein fibers that are surrounded by deposits of calcium salts.

Bone is surrounded by a tough layer of connective tissue called the _______________.

Blood vessels that pass through the periosteum carry oxygen and nutrients to the bone.

Beneath the periosteum is a thick layer of _______________ bone.

Osteocytes - Mature bone cells.

Osteoclasts and Osteoblasts line the _______________ canals and the surfaces of compact and spongy bone.

Osteoclasts - Break down bone.

Osteoblasts - Produce bone.

Osteoclasts and Osteoblasts are what _______________ remodel our bones even after we stop _______________.

Within bones are cavities that contain a soft tissue called bone marrow.

Two types of bone marrow:

Red bone marrow - produces red blood cells, some kinds of white blood cells, and cell fragments called _______________.

Yellow bone marrow - made up primarily of _______________ cells.

Compact Bone:

Although compact bone is dense, it is far from being solid.

Running through...