Comparative Test 4 (E1)

kidneys and associated ducts and storage bladders.

• Remove nitrogenous wastes and other wastes of metabolism (excretion).
• Maintain the water and salt balance of the body.

• Renal tubules
• Nephric tubules are the structural and functional units of the kidneys.

Cup-shaped spaces at one end of nephric tubules.

Kidneys that have renals capsules.

Capillary beds in the shape of small knots, these are the sites of blood filtration.

condition in which a glomerulus is surrounded by a renal capsule

condition in which the glomerulus (capillary bed) dumps into the coelom instead of a renal capsule. In this case the filtrate from the glomerulus must reach tubules indirectly.

openings of nephric tubules into the coelm (body cavity) in more primitive kidneys (those with external glomeruli).

a giant corpuscle formed fusion of smaller pronephric tubules.