Major Funding The Laura Moore Cunningham Foundation



Skeletons: Glossary

A

appendicular skeleton
The bones that allow movement - hands, arms, feet, legs, shoulder and pelvic girdle
axial skeleton
The bones in the center of our bodies - ribs, sternum, skill, spine - that protect our internal organs and keep us upright

B

ball and socket joint
A joint that allows wide range of movement, such as at the shoulder and hip
bone marrow
the jelly-like substance inside the bones where red blood cells, white blood cells, and platelets are made

C

calcium
a basic element found in plants and animals
cancellous bone
the spongy layer of bone between the compact bone and the bone marrow
cartilage
a strong fibrous material connecting joints
compact bone
The layer of the bone just below the surface, containing the smooth, hard part that you see when you look at a skeleton

E

elastic
stretchy
exoskeleton
a strong external covering on some animals

F

feature
characteristic or property
fibrous
containing fibers

H

hinge joint
A joint that allows one-way movement, as in the elbow and knee

I

invertebrates
animals that have no backbone

J

joint
the location where two bones meet

L

ligaments
bands that join one bone to another at a joint

M

marrow
center of bone material; creates blood and platelets
minerals
inorganic natural matter

P

periosteum
The thin, outer surface of a bone, containing nerves and blood vessels
protect
keep safe

S

series
a group of things in a particular order
skeletal system
the bones, joints, tendons, ligaments, and cartilage make up the skeletal system
spine
backbone
support
keep strong or in place

T

tendons
a fibrous tissue that attaches bones to muscles
tissues
groups of cells of the same type in living organisms

V

vertebrae
33 ring-shaped bones that make up the backbone
vertebrates
animals that have a backbone

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