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Dev of urinary sys
Development of urinary system
| Question | Answer |
|---|---|
| What is a compenent of the amniotic fluid? | Urine |
| Describe myometrium | It is all smooth muscle. Important in supporting the development of fetus. And expelling fetus at full term |
| What is mucosa? | When concepsus. will start to get more glandular tissue. Starts to produce hormones. It will bring blood supply to the fetus |
| Describe the placenta | It is a large organ. Tertiary side is filled with blood. There is intervillus space (outside of villus) where the maternal blood supply is suqirt |
| What happens if amnion is ruptured? | Oligohydraminos: Amniotic fluid is lost or decreased. THe fetus can't expand or move. the lungs won't develop |
| Name deformities due to oligohydraminos | Potter's facies: Couldn't grow properly. Renal Agenesis: Kidneys not developing |
| What mesoderm do the kidneys develop from? | Intermediate mesoderm develops into kidneys and genital systme |
| When the gonad is elongated what is the portion of the kidney referred to? | Mesonephros |
| Describe the mesonephric duct | At first it is not hollow. the mesoderm in the area develops into a epithelium |
| What is the pronephro kidney? | Early on kidney (it looks like a flat worm)It has a small collecting duct that is there for a short period then disappears (doesn't have blood supply) |
| Describe the mesonephric system | Starts around head, moves down and head region disappears. |
| What happens when things become unecessary in the mesonephric system development? | They get picked up by the gonad and become functional for the gonadal tissue |
| True or False: The tubule system becomes functional | False. It does not become functional and gets picked up by the gonad |
| When does the mesonephric duct become hollow? | As soon as it makes contact with cloaca it starts to become hollow from inferior to superior |
| Describe the paramesonephric duct | It is also growing while the rest is growing and will be part of reproductive system but develops in the urogenital ridge |
| List steps of metaphrenic kidney development | 1. Epithelial tube formation and elongation. 2. tubule branching. 3. cell condensation. 4. mesenchymal to epithelial conversion. 5. specificaiton and differentiation of cells |
| What did the ureteric bud develop from | It is mesoderm that developed from epithilialzation from the mesonephric duct |
| What is the mesenchym around the ureteric bud called? | Metanephric blastema |
| Describe the interaction between the bud and blastema? | One induces the other and the other in turn induces the other and it goes back and forth |
| What is the system from the ureteric bud called? | The collecting system: Drains the urine |
| What is the system from the metanephric blastema called? | The excretory component (going to make the urine) |
| What elements are in the metanephric blastema? | Elements responsible for inducing. Mesenchyme will induce the duct and vice versa to proliferate more factors |
| How does the gonad and kidney move in development? | The gonad moves down and the kidney moves up |
| How does the kidney get blood supply from the dorsal aorta? | New blood vessels form off of the aorta and the old ones regress |
| Where is the venous drainage going? | Into the inferior vena cava |
| What is a horseshoe kidney? | When the kindeys become confluent and don't separate. Get snagged on the point where the superior mesenteric artery leaves the aorta. usually no affect. |
| What is a pelvic kidney? | when the kidney doesn't rise |
| Describe changes in the urogenital sinus during development | It gets smaller and the phallus is growing. there is a septum coming down. the cloaca is separating into urogenital area and a anal area |
| Describe the exstrophy of mesonephric duct | As the bladder gets bigger it pulls in the duct |
| Where is the urinary trigon located? | At the base of the bladder between where the urethra is leaving and where the two ureters enter. It is a common area for cancer |
| In relation to males what does the mesonephric duct become? | The ductus deferens |
| Where is the central tendon located in the perineum> | In the middle. Where the urorectal septum comes down and attaches to the ectoderm |
| Name the folds involved in cloacal septation | 2 Rathke folds from the left and right that join in the center. 1 tourneux fold that joins from the top |
| Name improper septation of cloacal region | High urorectal fistula: Overgrowth of Rathke's fold. Imperforate anus: A pit without connection |
| Name anomalies of the ureter | Duplication of ureters. Ectopic ureters: It can go into vagina or enter from top causing problems |
| Where is the normal place for urters to enter the bladder? | Posteroinferior side of bladder |
| Name anomolies of the urachus | Urachal fistula: uring can come out of umbilical scar. Urachal cyst: Sometimes confused with umbilical hernia. Urachal sinus: Pus coming out of umbilical scar. Lower urinary tract obstruction |
| Describe lower urinary tract obstruction | Lower urinal tract is blocked off and the urine is retained in the bladder |
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