MERONEPHRIDIA Meaning and
Definition
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Meronephridia refers to a type of excretory system found in many invertebrates, particularly in segmented worms known as annelids. It is a network of tubule-like structures called nephridia, which function to remove metabolic wastes from the organism and maintain fluid homeostasis.
Meronephridia consist of multiple, paired nephridia located along the length of the body segments in annelids. Each nephridium is composed of a ciliated funnel-like structure called a nephrostome, which opens into a coiled tubule called the proximal nephridial tubule. The tubule continues as a duct, often with several loops, before eventually connecting to an external pore called the nephridiopore.
The process of excretion through meronephridia involves the filtration of waste products and excess fluids from the coelomic fluid (internal body cavity) through the nephrostome. The fluids then travel through the tubule, where reabsorption of essential ions and water may occur, before being finally eliminated through the nephridiopore.
Meronephridial excretory systems play a vital role in regulating osmotic balance, ion concentrations, and nitrogenous waste elimination in annelids and other invertebrates possessing this type of excretory system. While specific structures and functions may vary among different species, the overall purpose of meronephridia remains consistent – assisting in the removal of metabolic waste materials from the organism's body and maintaining internal fluid balance.
Common Misspellings for MERONEPHRIDIA
- Maronephridia
- Moronephridia
- Meronaphridia
- Meronephredia
- Meronephria
Etymology of MERONEPHRIDIA
The word meronephridia is derived from two Greek roots: meros, which means part or segment, and nephros, which means kidney.
