nephridium

The nephridium projects into the main venous sinus in the animal's foot.

The primary organ of excretion is a nephridium.

The nephridium also plays an important role in maintaining water balance in freshwater and terrestrial species.

These secrete waste into the haemolymph, prior to further filtration in the nephridium.

Pulmonates lack these glands, so that the nephridium is the only major organ of excretion.

"Did you get out the nephridium?"

He sat to the last moment doggedly struggling to keep cool and to mount the ciliated funnel of an earthworm's nephridium.

In aquatic gastropods, the nephridium is drained by a ureter that opens near the rear of the mantle cavity.

The primary organs of excretion in gastropods are nephridium, which produce either ammonia or uric acid as a waste product.

From the arterial sinuses bathing the tissues, it drains into the venous sinus, and thus flows past the nephridium.

In some gastropods, the nephridium opens directly into the sinus, but more usually, there is a small duct, referred to as the renopericardial canal.

They have a single gonad occupying much of the posterior part of the body, and shed their gametes into the water through the nephridium.

The pouch is occupied by special cells called podozytes, which facilitate ultrafiltration of the blood through the partition between haemocoelom and nephridium.

A structure called a nephridium removes metabolic waste and expels it through pores on the sides; two or more nephridia are found in most segments.

The early development of the nephridia in Amphioxus, Introduction and part I: Hatschek's Nephridium.

The nephridium (plural nephridia) is an invertebrate organ which occurs in pairs and performs a function similar to the vertebrate kidney.

"That confounded nephridium--!"

From his research of amphioxus, the anatomical terms- "Hatschek's pit" and "Hatschek's nephridium" are derived.

In the case of freshwater species, the nephridium also resorbs a significant amount of salt in order to prevent its loss through osmosis into the surrounding water.

Filtered nitrogenous waste is produced in the pericardial cavity of the branchial hearts, each of which is connected to a nephridium by a narrow canal.

The second maxillae also have a metameric pore, which is the opening of the maxillary gland and maxillary nephridium homologous to those of millipedes.

De-oxygenated haemolymph drains into a large venous sinus within the head and foot, which contains the nephridium, an excretory organ with a function similar to that of the vertebrate kidney.

The most primitive gastropods retain two nephridia, but in the great majority of species, the right nephridium has been lost, leaving a single excretory organ, located in the anterior part of the visceral mass.

In the lancelet Hatschek's pit, not to be confused with Hatschek's nephridium, is a deep ciliated fossa on the dorsal midline of the buccal cavity (the region of the gut behind the mouth) (1) Among other things, it secrets mucus which entraps food particles from the water.