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Gr 7 Science Ch 3

Gr 7 Science Ch 3.3 (Integumentary, Skeletal, & Muscular Systems)

TermDefinition
integumentary system body system that covers and protects the body
skin organ that covers and protects the body
epidermis top layer of skin
melanin most important pigment that determines skin color
dermis second layer of the skin
subcutaneous layer layer of fat cells just below the dermis; also called hypodermis
skeletal system body system that supports the body and gives it shape
marrow soft, fatty tissue in the porous center of a long bone
long bones none that is longer than it is wide and has enlarged ends
short bones cube-shaped bone
flat bones bones that are relatively flat and usually protect vital organs
irregular bone any bone that does not fit in any of the other three bone categories
axial skeleton division of the skeleton that includes the head, spine, and ribs
skull portion of the skeleton consisting of the cranium and facial bones
vertebral colmn series of vertebrae that cover the spinal cord of a human or a vertebrate animal
appendicular skeleton portion of the skeleton that includes the bones of the appendages and the bones that connect them to the axial skeleton
joint place where two or more bones meet
ligaments any of the strong, tough tissues that connect bones to other bones
fracture break, chip or crack in a bone
muscular system body system responsible for producing movement
skeletal muscles muscle that can be controlled directly with the conscious mind
tendons tough, cord-like structure that attaches a muscle to a bone
origin relatively immovable part of the body to which a skeletal muscle is anchored
insertion movable part of the body to which one side of a skeletal muscle is attached
involuntary muscles muscle that is part of another organ and functions without thought
simple fracture fracture in which the bone remains within the body and does not penetrate the skin
compound fracture fracture in which the bone breaks through the skin's surface
sinus any of the hollow spaces in the skull that help your voice resonate and lighten the skull
adipose tissue fat tissue
Created by: mbrennan262