list the two layers that form the skin
dermis, epidermis
list two pigments found in human skin
carotene, melanin
what stucture of the skin is responsible for the formation of fingerprints
papillae
an area of thickened epidermis is called a___________
callus
besides perspiration, what else does your skin do to keep you cool
blood vessels openwide to permit more blood to flow near the surface
what is below the dermis that is not really a part of the skin
subcutaneous layer
what is formed when the skin is exposed to intense heat or rubbed strongly before the epidermis has time to form a callus
blisters
what protects your brain, eyes, and ears
skull
what are some functions of the skeletal system
1. framework for support and movement2. protection3. storage of minerals4. production of blood cells
what are bands of connective tissue that connect muscles to bones
tendons
tough, flexible bands of connective tissue that attach bones to other bones at joints
ligaments
a place were two or more bones meet
joint
what joints bend in only one direction
hinge joints
what two minerals are especially important in giving bones their strength
calcium and phosphorus
besides bone, what other tissue composes skeletons
cartilage
muscles that you can controlat will are called________
voluntary muscles
the muscles which move your skeleton are called___________
skeletal muscles
muscles you cannot control are called______
involuntary muscles
what organ has involuntary, striated muscle
heart
which muscle is the longest in your body
sartorious
when muscles__________, they produce heat
contract
why is the skin considered a major defence against disease
it is a physical barrier agianst disease causing organisms
which layer of skin contains hair follicles
dermis
what is the best way to treat first-degree burns
run under cool water, then wrap a clean dry dressing
how does your bone marrow affect your blood
blood cells are made in the bone marrow
what is the name for the tough, white tissues that forms new bone tissue
periosteum
what do you call the bands of connective tissue that connect muscle to bone
tendons
what kind of joints do not allow movement
fused joints
which kinds of muscles are striated
heart and skeletal muscle
what metabolic processes supply the energy for muscles to contract
aerobic cellular respiration and sometimes anaerobic cellular respiration