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SCIENCE CHAPTER 24

Definitions

TermDefinition
Epidermis A tissue that serves as a protective covering layer in plants; (24) the outer layer of tissue in humans and many animals.
Dermis The thick outer layer of the skin.
subcutaneous layer The layer of fat and connective tissues below the dermis of the skin.
Melanin A dark brown or black pigment.
Callus A area of skin w/ a thickened epidermis.
Blister A water-filled swelling of the epidermis of the skin.
Bone marrow A soft tissue that produce, blood cells; located in the marrow cavity of long bones and in the space of spongy bones.
Ligament A band of connective tissue that holds the bones of a joint in place.
Tendon The connective tissue that attaches muscle to bone.
Bone The strong supporting structure of vertebrates.
Osteon A microscopic unit of a bone consisting of a blood vessel and layers of hard nonliving material around it.
Cartilage A flexible supporting tissue that makes up part or all of some animals skeletons.
Joint The place where two or more bones meet.
Voluntary muscle A muscle that can be controlled at will.
Skeletal muscle Muscle tissue that attacks to and moves the skeleton.
Striated muscle Muscle tissue that displays a pattern of light and dark bands.
Involuntary muscle A muscle controlled automatically by thee brain; controlled w/out conscious effort.
Smooth muscle Muscle tissue that lacks striations; forms the walls of many internal organs.
Cardiac muscle A kind of striated involuntary muscle that is found in the heart.
Created by: yoceli