| proximal radioulnar articulation | The pivot synovial joint between the head of the radius and the ring formed by the radial notch of the ulna and the annular ligament. Synonym: articulatio radioulnaris proximalis, proximal radioulnar articulation, superior radioulnar joint. (05 Mar 2000) |
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| proximal radioulnar joint | The pivot synovial joint between the head of the radius and the ring formed by the radial notch of the ulna and the annular ligament. Synonym: articulatio radioulnaris proximalis, proximal radioulnar articulation, superior radioulnar joint. (05 Mar 2000) |
| proximal small bowel disease | <radiology> Giardia, eosinophilic gastroenteritis, Zollinger-Ellison (12 Dec 1998) |
| proximal spiral septum | See: spiral septum. (05 Mar 2000) |
| proximal tibiofibular joint | The plane synovial joint between the lateral condyle of the tibia and the head of the fibula. Synonym: articulatio tibiofibularis, superior tibial articulation, superior tibiofibular joint, tibiofibular articulation. (05 Mar 2000) |
| proximal urethral sphincter | The complete collar of smooth muscle cells of the neck of the urinary bladder which extend distally to surround the preprostatic sportion of the male urethra. There is not a comparable structure in the neck of the femoral bladder; the internal urethral sphincter may exist to prevent reflux of semen into bladder. Synonym: annulus urethralis, internal urethral sphincter, musculus sphincter vesicae, preprostate urethral sphincter, proximal urethral sphincter, sphincter muscle of urinary bladder. (05 Mar 2000) |
| renal tubule | <anatomy> Small structures in the kidney that filter the blood and produce the urine. (12 Dec 1998) |
| mesonephric tubule | An excretory tubule of the mesonephros. Synonym: segmental tubule. (05 Mar 2000) |
| metanephric tubule | An excretory unit of the metanephros or permanent kidney. (05 Mar 2000) |
| collecting tubule | The continuation of the tubulus seminifer contortus which becomes straight just before entering the mediastinum to form the rete testis. Synonym: tubulus renalis rectus, tubulus seminifer rectus, collecting tubule, straight tubule, tubulus rectus, tubulus rectus, vasa recta. (05 Mar 2000) |
| connecting tubule | A narrow arching tubule of the kidney joining the distal convoluted tubule and the collecting tubule. (05 Mar 2000) |
| pronephric tubule | An excretory unit of the pronephros, present only in vestigial form in human embryos. (05 Mar 2000) |
| segmental tubule | An excretory tubule of the mesonephros. Synonym: segmental tubule. (05 Mar 2000) |
| seminiferous tubule | <anatomy> In the testicles, the network of tubes where sperm cells are formed. (09 Oct 1997) |
| seminiferous tubule dysgenesis | A disorder in which the seminiferous tubules exhibit an abnormal cytoarchitecture and extensive hyalinization; the testes are small, and few spermatozoa are formed; the body habitus may be eunuchoid, and gynaecomastia may be present; urinary gonadotropin output is usually high, and the incidence of mental deficiency and illness increased; sex chromatin may be male or female, and androgen secretion ranges from subnormal to normal. It is a constant feature of (and is often used synonymously with) Klinefelter's syndrome. Synonym: germinal aplasia. (05 Mar 2000) |