| A | B |
|---|
| Cardiac muscle | striated, involuntary muscle found only in the heart |
| Cartilage | tough, flexible tissue that joins vertebrate and makes up all or part of the vertebrate endoskeleton; in humans, thick, smooth, flexible, and slippery tissue layer that covers the ends of bones, makes movement easier by reducing friction, and absorbs shocks |
| Dermis | skin layer below the epidermis that contains blood vessels, nerves, oil and sweat glands, and other structures |
| Epidermis | outer, thinnest skin layer that constantly produces new cells to replace the dead cells rubbed off its surface |
| Involuntary muscle | muscle, such as heart muscle, that cannot be consciously controlled |
| Joint | any place where two or more bones come together; can be moveable or immoveable |
| Ligament | tough band of tissue that holds bones together at joints |
| Melanin | pigment produced by the epidermis that protects skin from sun damage and gives skin and eyes their color |
| Muscle | organ that can relax, contract, and provide the force to move bones and body parts |
| Periostium | tough, tight0fitting membrane that covers a bone’s surface and contains blood vessels that transports nutrients to the bones |
| Skeletal muscle | voluntary, striated muscles that moves bones, works in pairs, and is attached to bones by tendons |
| Skeletal system | all the bones in the body; forms an internal, living framework that provides shape and support, protects internal organs, moves bones, forms blood cells, and stores calcium and phosphorus compounds for later use |
| Tendon | thick band of tissue that attaches bones to muscles |
| Voluntary muscle | muscle, such as leg or arm muscle, that can be consciously controlled |
