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Bones, Muscles, Skin
UNIT 3 Vocabulary
20
Biology
7th Grade
10/18/2010

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Term
Tissues
Definition
A group of similar (same kind) of cells working together
Term
Organs
Definition
A structure in the body made of different kinds of tissue that work together to do a specific job. Example: Heart (nerve, muscle, connective and epithelial)
Term
Organ System
Definition
A group of organs that work together to perform a major function. Example: The heart, lungs and blood vessels are part of the circulatory system.
Term
Skin
Definition
Covers the entire body, largest organ in the body. Has layers and works to protect the body by regulating heat loss and from damage & disease.
Term
Skeletal System
Definition
All of the bones in the body working together to provide support and movement for the body.
Term
Bones
Definition
The support structures of the body. 206 bones in the human body. Provide support, protection and movement.
Term
Joints
Definition
Where two bones come togehter in the body. There are four kinds of joints: Ball and Socket/Shoulder, Pivot/neck, Gliding/wrist and ankle, Hinge/knee and elbow.
Term
Muscular System
Definition
All the muscles of the body working together to provide support and movement for the body. 600 muscles. 3 Types: Skeletal (attached to bones), Smooth (digestive and internal organs) and Cardiac (heart only).
Term
Voluntary
Definition
This means that you can control the contraction of the muscle in your body: Example: Skeletal muscles.
Term
Involuntary
Definition
Muscles that you cannot control in your body. Example: heart muscle, stomach muscle, intestinal muscles.
Term
Tendon
Definition
Connective tissue that connects muscles to bones.
Term
Ligaments
Definition
Connective tissue that connects bones to bones.
Term
Bone Marrow
Definition
Soft tissue inside the large, long bones that produces red blood cells and stores energy.
Term
Cartilage
Definition
Flexible connective tissue found in the ears, nose and in joints between bones.
Term
Sprain
Definition
An injury to a ligament caused by excessive stretching or tearing.
Term
Integumentary System
Definition
System that protects the body from damage, loss of water. Includes: skin, hair, nails.
Term
Work
Definition
The use of force to move an object over a distance. Work = Force x Distance
Term
Force
Definition
A "push" or a "pull" that changes the motion of an object.
Term
Motion
Definition
The change in an object's position.
Term
Simple Machines
Definition
Something that makes work easier: six types,
Wedge, Screw, Lever, Pulley, Incline Plane, Wheel & Axle.
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