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12 terms

7th Grade Science Test for 4/30/12

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5 Functions of the Skeletal System
The 5 five functions are it provides shape and support, enables you to move, protects your organs, produces blood cells, and stores minerals and other materials until you body needs them
Hinge Joint
This joint allows forward or backward motion. You knee and your elbow is this type of joint
Ball-and-Socket Joint
This joint allows the greatest range of motion. Your shoulder is this type of joint, the joint allows your shoulder to swing in a circle
Pivot Joint
This joint allows one bone to rotate around another. This joint is in your neck, it allows you neck to turn from side to side
Gliding Joint
This joint allows one bone to slide over another. This joint is in your wrist and your ankles, the joint enaables you to bend and flex as well as make limited side-to-side motions
What is the Difference between Voluntary and Involuntary Muscles
Voluntary muscles you control, like when you pick up a pencil or smiling, involuntary muscles you don't control like breathing and digesting your food
Cartilage
Covers the end of bones, cushions, nose and ears
Ligaments
Holds bones/ joints together
Tendons
Connects muscles to bones
5 Functions of Skin
The 5 functions of this are it covers and protects the body from injury, infection, and water loss. It also helps regulate body temperature, eliminate wastes, gather information abut the environment, and produces vitamin D
Epidermis
The outer layer of skin. In most places, it is thinner than the inner skin, it does not have nerves or blood vessels
Dermis
The inner layer of skin. This layer contains nerves and blood vessels. It also contains sweat glands, hairs, and oil glands. It is the one with pores and the follicles