From PIV:

gamb/o: Tuto de la malsupra membro de homo.

Translation:

gamb/o: The entire lower member of a human.

And, for kruro

krur/o:

1 Malsupra membro de dupiedulo, antaŭa aŭ malantaŭa membro de kvarpiedulo, aŭ membro de artropodo

2 ❤ (crus) Parto de la malsupra (aŭ malantaŭa) membro de la vertebruloj, inter genuo k piedo

3 Analoga parto ĉe objekto

Translation:

krur/o:

1 Lower member [limb] of a biped, front or hind member of a quadruped, or a member of an arthropod

2 ❤ (crus) Part of the lower (or hind) member of vertebrates, between knee and foot

3 Analogous part of an object

The ❤ indicates use in biology and histology. So, at least according to PIV, the differences are:

• Gambo always refers to the entire lower limb, while kruro in some contexts is only the part between knee and foot.

• Gambo is only used for human legs, while kruro can also refer to the legs of animals, arthropods, and objects such as furniture.

I have also noticed that kruro is more commonly used, even for human legs.

From PIV:

gamb/o: Tuto de la malsupra membro de homo.

Translation:

gamb/o: The entire lower member of a human.

And, for kruro

*krur/o:

1 Malsupra membro de dupiedulo, antaŭa aŭ malantaŭa membro de kvarpiedulo, aŭ membro de artropodo

2 ❤ (crus) Parto de la malsupra (aŭ malantaŭa) membro de la vertebruloj, inter genuo k piedo

3 Analoga parto ĉe objekto

Translation:

krur/o:

1 Lower member [limb] of a biped, front or hind member of a quadruped, or a member of an arthropod

2 ❤ (crus) Part of the lower (or hind) member of vertebrates, between knee and foot

3 Analogous part of an object

The ❤ indicates use in biology and histology. So, at least according to PIV, the differences are:

• Gambo always refers to the entire lower limb, while kruro in some contexts is only the part between knee and foot.

• Gambo is only used for human legs, while kruro can also refer to the legs of animals, arthropods, and objects such as furniture.

I have also noticed that kruro is more commonly used, even for human legs.

From PIV:

gamb/o: Tuto de la malsupra membro de homo.

Translation:

gamb/o: The entire lower member of a human.

And, for kruro

krur/o:

1 Malsupra membro de dupiedulo, antaŭa aŭ malantaŭa membro de kvarpiedulo, aŭ membro de artropodo

2 ❤ (crus) Parto de la malsupra (aŭ malantaŭa) membro de la vertebruloj, inter genuo k piedo

3 Analoga parto ĉe objekto

Translation:

krur/o:

1 Lower member [limb] of a biped, front or hind member of a quadruped, or a member of an arthropod

2 ❤ (crus) Part of the lower (or hind) member of vertebrates, between knee and foot

3 Analogous part of an object

The ❤ indicates use in biology and histology. So, at least according to PIV, the differences are:

• Gambo always refers to the entire lower limb, while kruro in some contexts is only the part between knee and foot.

• Gambo is only used for human legs, while kruro refers to the legs of animals, arthropods, and objects such as furniture.

I have also noticed that kruro is more commonly used, even for human legs.

From PIV:

gamb/o: Tuto de la malsupra membro de homo.

Translation:

gamb/o: The entire lower member of a human.

And, for kruro

krur/o:

1 Malsupra membro de dupiedulo, antaŭa aŭ malantaŭa membro de kvarpiedulo, aŭ membro de artropodo

2 ❤ (crus) Parto de la malsupra (aŭ malantaŭa) membro de la vertebruloj, inter genuo k piedo

3 Analoga parto ĉe objekto

Translation:

krur/o:

1 Lower member [limb] of a biped, front or hind member of a quadruped, or a member of an arthropod

2 ❤ (crus) Part of the lower (or hind) member of vertebrates, between knee and foot

3 Analogous part of an object

The ❤ indicates use in biology and histology. So, at least according to PIV, the differences are:

• Gambo always refers to the entire lower limb, while kruro in some contexts is only the part between knee and foot.

• Gambo is only used for human legs, while kruro can also refer to the legs of animals, arthropods, and objects such as furniture.

I have also noticed that kruro is more commonly used, even for human legs.