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Circ. Resp. and Excr

7th grade Science

TermDefinition
blood these cells carryneeded substances are carried to the body
receives blood that comes into the heart the function of the atria
little oxygen and a lot of carbon dioxide blood when it flows into the right atrium
valve prevents blood from flowing backwards
clotting of blood platelets function in the blood
marker molecules on red blood cells determines blood type
atherosclerosis artery walls thicken as the result of a buildup of fatty materials
red blood cells component of blood that carries oxygen to the body's cells
plasma component of blood that is 90% water
fight disease function of white blood cells
when ventricles contract blood is pumped out of the heart
carbon dioxide and water substances produced during respiration
cellular respiration chemical process in which oxygen and glucose react to release energy inside body cells
pharnyx in both the respiratory and digestive systems
oxygen during gas exchange, this substance moves from alveoli into the blood
alveoli where the gas exchanges occurs
lung cancer a tumor in the lungs is a sign of this
main function of excretory system collect and remove waste from the body
function of respiratory system bring oxygen into the body
epiglottis small flap of tissue the seals off the trachea during swallowing
bronchi parts of the respiratory sysem that divide into smaller and smaller tubes
cilia hairlike structures that line the trachea
capillaries surround the alveolus
nicotine chemical in tobacco smoke that is an addictive drug
urinary bladder organ of the excretory system that stores urine until the body is ready to eliminate it
liver excretory organ where urea is produced
skin excretory organ that eliminates water and chemical wastes in perspiration
aorta largest artery in the heart
pacemaker group of cells that regulate the rate at which the heart beats
valve flap of tissue in the heart that separtes the right atrium from the right ventricle
veins blood returns to the heart through these blood vessels
ventricles this contracts to cause blood pressure
platelets fibrin is produced when these blood components start a chain reaction to produce a blood clot
Created by: dselling