Monday 20 June 2011

Fetal Pig Dissection Day 5: Urogenital & Urinary Systems

Day 5 :
Day 5 of our dissection was about the urogenital system and urinary system. That includes the sexual reproductive organs of the pig which in our case is a female. Since we have a female we look at the ovaries, fallopian tubes, uterus and vagina. Both the male and female urinary system is the same except the exit point is different. They both have kidneys, ureter, bladder, and urethra.
 This is a picture of the kidney which is the place where urine is created. Inside the kidney is a whole bunch of nephrons. A nephron has many different parts that include glomerulus, bowmans capsle, proximal tubule, loop of henle, distal tubule, and finally the collecting duct. Each one of these components of a nephron have important jobs. The Glomerulus is a mass of capillaries that has very high pressure and is the site of filtration, Bowmans Capsle surrounds the Glomerulus and receives the filtered fluids from the Glomerulus. Proximal means near or close to so the Proximal Tubule is the tube that is near the begging of the nephron this tube brings the fluid into the Loop of Henle. The Loop of Henle is surrounded by Peritubular Capillary Network and is the site of salt and water concentration.

  
From the kidneys is a tube that travels from the pelvis of the kidney right to thee bladder this tube is called the ureter and it tastes the urine from each collecting duct in the kidney to store in the bladder
 from the bladder there is another tube called the urethra which takes the stored urine in the bladder and excretes it out of the body. The female and male differ when it comes to the urethra because the females have a urethra that excretes the urine out of the body and then a vagina cavity for sexual reproduction where as the males urethra is attached to the vas defferens which means that is carries both sperm and urine but never at the same time.

Since our pig was of the female gender our urogenital check list was ovaries, fallopian tubes, and uterus. A neat thing about the fetal pigs uterus is that unlike us it has a "Y" shaped uterus in order to have multiple babies where as we have a "Pear" shaped uterus. The reproductive system is not one that is very easy it is a complicated system and is different for both male and females. Males have a penis instead of a vagina, testes instead of ovaries, and ovum instead of sperm. The penis is the male sex organ and has many sensitive nerves on the out side in order for sexual stimulation where as the female has the clitoris as a sexual stimulation and the vagina as the location for intercourse. Testes are where semen is made into mature sperm and the ovaries is where the females store their eggs. Males can make sperm to fertilize an egg in the moment where as females are born with a certain amount eggs.   



work cited
http://www.ivy-rose.co.uk/HumanBody-Images/Urinary/Kidney_Nephron_cIvyRose.jpg

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