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23 Cards in this Set

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  • Back
endothermy
the ability to maintain a high body temperature by using metabolic heat
ectothermy
lack of endothermy
thermoregulation
maintaining a high constant body temperature by regulating heat losses and gains to the outside environment
thermoconformity
in which body temperatureconforms to and is controlled by the external temperature
excretion
elimination of waste products
osmoregulation
maintenance of salt/water balance
steno-
narrow
eury-
wide
protonephridia
a series of blind tubules that are open on one end (to the outside via excretory pores); found in flatworms
metanephridia
tubules that are open on both ends (outside and inside the body), usually larger (and multicellular) than protonephridia' found in annelids, adult molluscs, and other protostomes
contractile vacuoles
organelles that require energy to pump excess water from the cell; seen in protists and sponges
antennal glands
found in crustaceans, located in the anterior portion of body, waste materials are secreted through small pores
Malpighian tubes
a series of tubules suspended into the hemocoel near the junction of the midgut and hindgut, emptying into the hindgut; found in insects
nephrons
kidney subunits, consisting of a single long tubule and a ball of capillaries (the glomerulus)
kidney
mammalian excretory system, also involved in osmoregulation
ureters
ducts for passage of urine from the kidney to the urinary bladder; roughly 25cm long in humans
bladder
spherical, stores urine and forces it into the urethra
urethra
tube through which urine is expelled
Bowman capsule
blind end of the nephron tubule, encases the glomerulus
glomerulus
the ball of capillaries
afferent arteriole
vessel supplying the nephron with blood (into the glomerulus)
efferent arteriole
vessel carrying blood out of the glomerulus, formed by converging capillaries
peritubular capillaries
efferent arteriole subdividing into branches surrounding the tubule (proximal and distal)of the nephron