science 24

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