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body systems and biosphere
semester2
43
Biology
10th Grade
06/04/2007

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Term
joints
Definition
where two or more bones meet
Term
ligaments
Definition
tough bands of connective tissue that attaches bone to bone
Term
three types of tissues (muscles)
Definition
SMOOTH
CARDIAC
SKELATAL
Term
were is cardiac muscle found
Definition
in the heart
Term
where is smooth muscle found
Definition
in the walls of internal organs and blood vessals
Term
where is skelatal muscle found
Definition
attached to bone
Term
myofibril
Definition
smaller units found in a muscle fiber
Term
neuron
Definition
nerve cell
Term
CNS
central nervous system
Definition
the bran and spinal cord
Term
Cerebellum
Definition
located at back of brain: controls balance, posture, and coordination
Term
medulla oblongata
Definition
controlls involuntary activities
Term
cerebral cortex
Definition
responsible for speaking, memories, emotions, senses, and muscles
Term
Peripheral Nervous System
PNS
Definition
carry messages to and from cns
Term
Molecules diffuse across a _________
Definition
membrane
Term
circulatory system
Definition
maintains internal homeostasis
Term
arteries
Definition
carry blood away from heart
Term
veins
Definition
carry blood toward heart
Term
capillaries
Definition
where diffusion takes place
Term
blood pressure
Definition
the force that blood everts
Term
biotic factors
Definition
living things in their environment
Term
organism
Definition
living thing
Term
population
Definition
same organisma living in an area
Term
community
Definition
different populations in an area
Term
ecosystem
Definition
communitys and abiotic factors
Term
biospher
Definition
all ecosystems on earth
Term
habitat
Definition
where organisms live
Term
nich
Definition
role and adaption to evironment
Term
symbiosis
Definition
living together
Term
mutualism
Definition
both species bennifit

:lichen = algea + fungi
Term
commensalism
Definition
one species bennifits, and the other doesnt, without harm
Term
parasitism
Definition
one species bennifits at other species expence
Term
trophic level
Definition
a step in the food chain
Term
exponential growth
Definition
as a population gets larger it also grows at a faster rate
Term
carrying capacity
Definition
the number of organisms an environment can suppot
Term
demography
Definition
the study of the human population
Term
the edge effect
Definition
when one ecosystem has met another
Term
habitat degration
Definition
damage to an evoronment due to polltion
Term
what is the outermost layer of the skin
Definition
epidermis
Term
what is a protective protein found in dead skin
Definition
kariten
Term
the inner thicker part of the skin
Definition
dermis
Term
what does the sun activate the skin to make
Definition
vitamin D
Term
What is the first sight of mechanical digestion
Definition
oral cavity
Term
gastric juice secreated by stomah
Definition
pepson
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