pronephron
Word Rarity
Very rare
Frequency: Zipf frequency 0.00 in modern English
17
Scrabble Score
10
Letters
1
Syllables
6
Unique Chars
Meaning
noun
The first part of the urogenital system to be differentiated in a vertebrate embryo, which functions as a simple excretory organ in simpler forms, serves as a provisional kidney in some fish and amphibians, and only appears as a temporary embryonic structure in reptiles, birds, and mammals.
Example Sentences
- "In addition, while in the pronephron only vacuolization was noted, the structure of the liver had an atypical appearance and there was a considerable number of erythrocytes scattered among the hepatic chords which themselves were noticeably altered."
- "The whole problem turned around a detailed understanding of the so-called Wolffian body, what modern textbooks in embryology designate as the pronephron and its associated Wolffian or pronephric ducts."
- "Regression of the first clusters occurs before the total number of pronephron structures is established. The pronephrons induce the development of the mesonephrons. As the pronephrons regress, the mesonephrons appear."