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epithelial tissue

tissue that lines and protects internal organs; has a basement membrane; can absorb or secrete

muscular tissue

uses protein filaments of actin and myosin; contains sarcomeres; can be voluntary or involuntary; has cells that are spindle or branched

nervous tissue

a body tissue that carries electrical messages back and forth between the brain and every other part of the body; contains axons, dendrites, and cell bodies

connective tissue

a body tissue that provides support for the body and connects all of its parts; can be solid, semi-solid, or liquid; the most versatile tissue; includes ligaments


in skeletal muscle, the functional unit that contracts and is composed of myofibrils


causes muscles to contract and relax; proteins


strong connective tissue that attaches muscle to bone


a flexible band of fibrous tissue that connects bone to bone

axial skeleton

forms the main trunk of the body and is composed of the skull, spinal column, ribs, and breastbone

appendicular skeleton

arm bones, pelvic girdle, and leg bones, feet and hands


tough layer of connective tissue surrounding a bone

compact bone

Hard, dense bone tissue that is beneath the outer membrane of a bone

spongy bone

Layer of bone tissue having many small spaces and found just inside the layer of compact bone.


the formation of blood cells in the bone marrow

red marrow

in the spongy bone; makes red blood cells

yellow marrow

soft, fatty material found in the long bones

medullary canal

hollow region in bone shaft which acts as a storage area for bone marrow

articular cartilage

covers the surfaces of bones where they come together to form joints


unit of compact bone; made up of concentric circles called Haversian canals

hinge joint

at the elbow, knee, ankle, and fingers, allows a joint to bend and straighten promoting rotation

pivot joint

one bone rotates in a ring of another bone that does not move; head and neck

synovial fluid

lubricating substance found in joints

saddle joint

found at the base of thumb allowing thumb rotation and the ability to grasp objects

ball and socket joint

allows you to swing limb freely in a circle; found in shoulders and hips

hyaline cartilage

Most common type of cartilage; it is found on the ends of long bones, ribs, and nose

fused joint

allows for no movement at all
in skull

complete fracture

a break that extends through the entire thickness of the bone

green stick fracture

A partial bone fracture, usually occurring in children, in which the bone is bent but only broken on one side.

comminuted fracture

bone is splintered or crushed into several pieces


a condition in which the body's bones become weak and break easily


a disease of the joints in which cartilage breaks down;associated with aging

skeletal system

the main system for body support; the bones of your body

endocrine system

regulates hormones in the body that regulate processes such as growth, reproduction, and nutrient use (metabolism)

nervous system

consists of brain, spinal cord, and nerves and regulates the body's responses to internal and external stimuli

digestive system

the mouth, stomach, intestines, and salivary glands that change food into nutrients and wastes; converts chemical energy into useable energy

excretory system

group of organs including the kidneys, liver, skin, large intestine and lungs that purify the body by the elimination of waste matter; cleans the bloodstream

functions of skeletal system

support, protection, production, storage

Number of bones in body


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