Yes, Panama is an isthmus.
Yes, Panama is a classical isthmus.
Yes, Panama fits the definition of an isthmus.
No. Panama is part of central America, connected to both South America and North America.
Sure. Panama lays on a (relatively) narrow strip of land that connect two larger landmasses.
yes, because it connects Central and North America to South America.
It does not. Panama is a political state. An isthmus is a physical geographic feature. The land that Panama sits on may be regarded as an isthmus, but this does not correspond directly to Panama's political borders.
Yes, it is an isthmus because it connects North and Central America to South America.
Yes, it is an isthmus because it connects North and Central America to South America.
Yes, because an isthmus is a narrow strip of land separating two bodies of water.
Yes, it fits the definition
Yes, it does. Panama is extremely thin; it's widest point is just 110 miles.