Definition of nephridium in English:

nephridium

nounPlural nephridia nɪˈfrɪdɪəmnəˈfridēəm

Zoology

(in many invertebrate animals) a tubule open to the exterior which acts as an organ of excretion or osmoregulation. It typically has ciliated or flagellated cells and absorptive walls.
〔动〕（许多无脊椎动物的）大管肾
Example sentencesExamples
- Sperm is also released through the nephridium.
- Each segment typically contains a pair of nephridia.
- The organs they produce include segmental muscles, nephridia, gonads and gonoducts.
- Torsion in gastropods has the unfortunate result that wastes are expelled from the gut and nephridia near the gills.
- Gametes are shed into the coelom and carried outside the body through the nephridia or as a result of the body wall actually rupturing.

Derivatives

nephridial

adjective

Zoology

The whole layer of nephridial cytoplasm surrounding the radiating canals is 1 to 1.5 micron thick.
Example sentencesExamples
- For example, Nielsen cites the nonsegmental nature of these cavities in nemerteans and the lack of associated metanephridia or otherwise open nephridial connections as evidence against homology.
- Nemerteans possess protonephridia consisting of multiciliated terminal cells, a ciliated nephridial duct and a nephridiopore opening at the epidermis.
- The nephridial pore is located at the posterior end.
- Sensory and neurosecretory innervation of the nephridia is thus accomplished by a single neuron, which is thought to modulate nephridial performance.

Origin

Late 19th century: modern Latin, from Greek nephrion (diminutive of nephros 'kidney') + the diminutive ending -idium.

Definition of nephridium in US English:

nephridium

nounnəˈfridēəm

Zoology

(in many invertebrate animals) a tubule open to the exterior which acts as an organ of excretion or osmoregulation. It typically has ciliated or flagellated cells and absorptive walls.
〔动〕（许多无脊椎动物的）大管肾
Example sentencesExamples
- Gametes are shed into the coelom and carried outside the body through the nephridia or as a result of the body wall actually rupturing.
- Each segment typically contains a pair of nephridia.
- The organs they produce include segmental muscles, nephridia, gonads and gonoducts.
- Torsion in gastropods has the unfortunate result that wastes are expelled from the gut and nephridia near the gills.
- Sperm is also released through the nephridium.

Origin

Late 19th century: modern Latin, from Greek nephrion (diminutive of nephros ‘kidney’) + the diminutive ending -idium.

词汇	nephridium
释义	Definition of nephridium in English: nephridium nounPlural nephridia nɪˈfrɪdɪəmnəˈfridēəm Zoology (in many invertebrate animals) a tubule open to the exterior which acts as an organ of excretion or osmoregulation. It typically has ciliated or flagellated cells and absorptive walls. 〔动〕（许多无脊椎动物的）大管肾 Example sentencesExamples Sperm is also released through the nephridium. Each segment typically contains a pair of nephridia. The organs they produce include segmental muscles, nephridia, gonads and gonoducts. Torsion in gastropods has the unfortunate result that wastes are expelled from the gut and nephridia near the gills. Gametes are shed into the coelom and carried outside the body through the nephridia or as a result of the body wall actually rupturing. Derivatives nephridial adjective Zoology The whole layer of nephridial cytoplasm surrounding the radiating canals is 1 to 1.5 micron thick. Example sentencesExamples For example, Nielsen cites the nonsegmental nature of these cavities in nemerteans and the lack of associated metanephridia or otherwise open nephridial connections as evidence against homology. Nemerteans possess protonephridia consisting of multiciliated terminal cells, a ciliated nephridial duct and a nephridiopore opening at the epidermis. The nephridial pore is located at the posterior end. Sensory and neurosecretory innervation of the nephridia is thus accomplished by a single neuron, which is thought to modulate nephridial performance. Origin Late 19th century: modern Latin, from Greek nephrion (diminutive of nephros 'kidney') + the diminutive ending -idium. Definition of nephridium in US English: nephridium nounnəˈfridēəm Zoology (in many invertebrate animals) a tubule open to the exterior which acts as an organ of excretion or osmoregulation. It typically has ciliated or flagellated cells and absorptive walls. 〔动〕（许多无脊椎动物的）大管肾 Example sentencesExamples Gametes are shed into the coelom and carried outside the body through the nephridia or as a result of the body wall actually rupturing. Each segment typically contains a pair of nephridia. The organs they produce include segmental muscles, nephridia, gonads and gonoducts. Torsion in gastropods has the unfortunate result that wastes are expelled from the gut and nephridia near the gills. Sperm is also released through the nephridium. Origin Late 19th century: modern Latin, from Greek nephrion (diminutive of nephros ‘kidney’) + the diminutive ending -idium.
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