Exercise 20: The Excretory System
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It refers to the process of removing nitrogenous metabolic wastes via organs of filtration.
excretion
Complete the sentence below: Excretory organs also serve as _______________, removing excess fluids and salts.
osmoregulators
Identify the types of excretory organs.
• protonephridia • metanephridia • antennal glands • malpighian tubules • kidneys
It is the excretory organ of flatworms.
protonephridia
It is the excretory organ of mollusks and annelids.
metanephridia
It is the excretory organ of mollusks and annelids.
metanephridia
It is the excretory organ of crustaceans.
antennal glands
It is the excretory organ of terrestrial arthropods.
malpighian tubules
It is the excretory organ of terrestrial arthropods.
malpighian tubules
Comlpete the sentence below: In unicellular organisms, wastes are moved through diffusion at the ____________ or ____________.
cell membrane, epithelium
Identify the types of nitrogenous wastes.
• ammonia • urea • uric acid
It is the excretory organ of cockroaches.
malpighian tubules
Which nitrogenous wastes do cockroaches excrete?
crystalline uric acid
In amphibians, it is the structure found dorso-lateral to the intestine, beneath the parietal peritoneum.
mesonephric kidneys
It refers to the space the mesonephric kidneys occupy.
cisterna magna (retroperitoneal space)
It refers to the space the mesonephric kidneys occupy.
cisterna magna (retroperitoneal space)
Complete the sentence below: The mesonephric kidneys are also referred to as _______________.
retroperitoneal
Complete the sentence below: The mesonephric kidneys are also referred to as _______________.
retroperitoneal
It is the structure lying on the lateral side of the mesonephric kidneys, descending posteriorly to the urinary bladder.
Wolffian (mesonephric) duct
Complete the sentence below: In amphibians, contents of the urinary bladder exit into the ____________.
cloaca
Complete the sentence below: The urinary bladder is found on the ____________ side of the pelvis.
ventral
Are yellow streaks on the ventral side of the mesonephric kidneys.
adrenal glands
Complete the sentence below: In male specimens, the mesonephric kidneys are dorsal to the ____________.
testes
Complete the sentence below: In amphibians, the mesonephric kidney section is ____________ dorsally and ____________ ventrally.
convex, concave