Skeletal System Crossword

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ACROSS
1   A living network of cells and protein fibers surrounded by calcium salts.
2   Any two places that bones connect are called __________.
4   Mature bone cells are called __________.
6   Strong, dense bone is called __________ bone.
7   This kind of joint lets one bone slide in two directions.
8   The skull is an example of an __________ joint.
9   The outer layer of connective tissue on bones is called __________.
11   The skeletal system __________ internal organs.
16   This is the process of forming bones.
17   Joints that allow a small amount of motion are called __________ joints.
18   This kind of marrow produces different blood cells.
20   Sections of cartilage at the end of bones that allow bone growth after birth is called __________.
22   Bone cells that break down bone are called __________.
23   The tibia is part of the __________ skeleton.
24   This is a dense, flexible connective tissue.
27   Tubes that hold blood vessels and nerves in bones are called the __________ __________.
29   Bone cells that build up bone are called __________.
 
DOWN
1   The skeletal system provides a place for __________ __________ to develop.
3   The skeletal system __________ the body.
4   When an osteoblast is surrounded by calcium salts, it becomes an __________.
5   The skeletal system stores __________.
10   This kind of bone is strong, but less dense than compact bone.
12   Osteoblasts begin to secrete minerals around themselves in the __________ trimester of pregnancy.
13   This kind of joint allows movement in many directions.
14   Knees are an example of this kind of joint.
15   This kind of joint causes one bone to rotate around another joint.
19   Marrow produces red blood cells, white blood cells and __________.
21   Bones start as cartilage __________ in embryos.
25   Yellow marrow stores __________.
26   Soft tissue within a bone is called __________.
28   The cranium is part of the __________ skeleton.

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