Science test Flashcards
The internal balance of a living organism is called
homeostasis
The ______ ________ is one of the main systems for maintaining homeostasis.
Circulatory system
is an iron containing pigment that makes erythrocytes appear red
hemoglobin
________ are chemicals produced by leukocytes that attack invading organisms or poisons
antibodies
are very small cell fragements that help in blood clotting…………
platelets
are thick blood vessels that always carry blood away from the heart
arteries
the smallest vessels are called
capillaries
the is a muscular organ about the size of your fist
heart
the upper thin walled chambers are called
atria
the larger inferior thick walled chambers are
ventricles
the atrium and ventricle on each side of the heart are separated by one way valves called
AV
the are located at the exits of the venticles
semilunar valves
the inferior ruturns blood from the lower body rigions …………
inferior vena cava
____ is the largest artery in the body
aorta
the pressure of circulatin blood against the walls of the arteries is called
blood pressure
the body’s final line of defense is the
immune system An——– is an overrecation of the immune system to a foreign substance that normally is not a pathogen
the main organs of the excretory system are the
kidneys
the are tubes that carry the wastes and water filtered out of the blood down to the urinary bladder
ureters
the _______ _______ is a muscular bag that temporarily stores th fluid wastes frol the knidneys
urinary bladder
A ______ is th eunit in the kidney that filters the blood
nephron
the ______ from the nephrons collects in the kidney and then passes into the urteter
urine
The proper name for red blood cells
erythrocytes
white blood cells
leukocytes
a cell fargment found in the blood that is involved in the formation of blood clots
platelet
an immunity in which a person maufactures his own antibodies or has activated t cells for a particular antigen
active
an immuntiy in which a person has been given antbodies that were formed by another person or animal
passive
the artificial removal of wastes from te blood o fa person with low kidney function
dialysis
