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Chapter 23

Integumentary, Muscular, Skeletal Systems

TermDefinition
integument an enveloping layer of an organism
epidermis in humans and some other animals, the outer superficial layer of skin made up of epithelial cells
keratin protein contained in the skin's outer epidermal cells that waterproofs and protects underlying cells and tissues
melanin pigment in the inner layer of the epidermis that protects against harmful ultraviolet radiation and influences skin color
hair follicle narrow cavity in the dermis from which a hair grows
sebaceous gland oil-producing gland in the dermis that lubricates skin and hair
cartilage tough, flexible connective tissue that forms the skeletons of embryos and later covers the surface of bones that move against each other in joints
axial skeleton
appendicular skeleton
compact bone
osteocyte
spongy bone
red bone marrow
yellow bone marrow
osteoblast
ossification
osteoclast
ligament
smooth muscle
involuntary muscle
cardiac muscle
skeletal muscle
voluntary muscle
tendon
myofibril
myosin
actin
sarcomere
anaerobic chemical reactions that do not require the presence of oxygen
Created by: MsQuinnScience
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