Changes

==Mesonephros==

==Mesonephros==

*''Development occurs in an anterior to posterior direction; the mesonephros kideny is found at the thoracic to lumbar level''.

*''Development occurs in an anterior to posterior direction; the mesonephros kidney is found at the thoracic to lumbar level''.

#The medial portion of the intermediate mesoderm forms a cup in the region of the capillaries.

#The medial portion of the intermediate mesoderm forms a cup in the region of the capillaries.

#*This is an early Bowman's capsule and improves waste removal.

#*This is an early Bowman's capsule and improves waste removal.

#*Excretory duct now known as the '''Wolffian Duct'''.

#*Excretory duct now known as the '''Wolffian Duct'''.

*Amphibians and fish use the mesonephric kidney.

*Amphibians and fish use the mesonephric kidney.

==Metanephros==

==Metanephros==