Nephrotome

Nephrotome is a term used in embryology to refer to a segment of the mesonephros, a primitive kidney of the embryo. The term is derived from the Greek words "nephros" meaning kidney and "tome" meaning cutting.

Etymology

The term "nephrotome" is derived from the Greek words "nephros" which means kidney and "tome" which means cutting. This term is used to describe a segment of the mesonephros, which is a primitive kidney in the embryo.

Function

The nephrotome is a part of the mesonephros, which is one of the three types of kidneys found in vertebrates during their embryonic development. The other two types are the pronephros and the metanephros. The nephrotome plays a crucial role in the development of the urinary and reproductive systems in the embryo.

Development

During the embryonic development, the nephrotome forms from the intermediate mesoderm. It is a part of the segmental structure of the mesonephros, which also includes the nephric duct and the nephric tubule. The nephrotome is responsible for the formation of the nephric tubule, which later develops into the functional unit of the kidney, the nephron.

Related Terms

• Mesonephros: A primitive kidney present during the embryonic development of vertebrates.
• Pronephros: The first of the three types of kidneys to develop in a vertebrate embryo.
• Metanephros: The permanent kidney in mammals, birds, and reptiles, which develops from the most caudal part of the nephrogenic cord.
• Nephric duct: A tube that carries urine from the primitive kidney to the cloaca in an embryo.
• Nephric tubule: A part of the primitive kidney that develops into the nephron, the functional unit of the kidney.