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science final
vocab
20
Science
7th Grade
05/04/2012

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Cards

Term
cardiac muscle
Definition
striated,involuntary muscle found only in the heart
Term
smooth muscle
Definition
involuntary,nonstriated muscle that controls movement of internal organs
Term
epidermis
Definition
outer, thinnest skin layer that constanly produces new cells to replace dead cells rubbed off its surface
Term
melanin
Definition
pigment produced by epidermis that protects skin from the sun damage and gives skin and eyes there color
Term
dermis
Definition
skin layer below the epidermis that contains blood vesssels, nerves, oil and sweat glands, and other structures
Term
nutrients
Definition
substances in foods poteins carbohydrates,fats,vitimins,minerals, and water that provide energy and materials for cell developement,growth,and repair
Term
proteins
Definition
large molecule that contains carbon,hydrogen,oxygen,nitrogen,,and sometimes sulfur and is made up of amino acids used by the body for growth and for replacement and repair of body cells
Term
amino acids
Definition
building block of proteins
Term
carbohydrates
Definition
nutrient that is usaully the body's main source of energy
Term
fats
Definition
nutrient that stores energy,cushions organs,and helps the body absorbs vitimins
Term
pollination
Definition
transfer of pollen grains to the female part of a seed plant by angents such as gravity,water,wind,and gravity
Term
ovule
Definition
in seed plants,the female reproductive part that produces eggs
Term
stamen
Definition
male reproductive organ inside the flower of an angiosperm consist of a anther,where pollen grains form,and a filament
Term
pistil
Definition
female reproductive organ inside the flower of an angiosperm cosist of a sticky stigma,when pollen grains land,and an ovary
Term
ovary
Definition
swollen base of anangiosperm's pistil,where egg-producing eggs
Term
germination
Definition
series of events that results in growth of a plant from a seed
Term
stomata
Definition
tiny openings in a plant's epidermis through which carbon dioxide,water vapor,and oxygen enter and exit
Term
chlorophyll
Definition
green,light-trapping pigment in plant chloroplasts that is important in photosynthesis
Term
photosynthesis
Definition
process by which plants and many other producers use light energy to produce simple sugar from carbon dioxide and water and give off oxygen
Term
respiration
Definition
series of chemical reactions used to release energy stored in food molecules
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