Excretory system - kidney, Biology

Kidney -

1153_kidney.png

  1. 2 in number. Dark red. Slightly flattened. Bean shaped.
  2. 10 cm. long, 5 cm wide and 4 cm thick (In rabbit 20-25 mm). Weighing 150 gm in male 135 gm in female.
  3. Mesodermal in origin. Retroperitoneal, i.e. peritonium present on ventral side. Metanephric.
  4. Asymetrical, left kidney is 25 mm downward. Haemostatic organ given by w. cannon.
  5. Attached to dorsal wall by mesorchium membrane.
  6. Situated in anterior abdominal cavity, below diaphragm on both side of vertebral column between the last thoracic vertebrae & 2rd lumler vertebrae. Kidney are outerly convex and internally too.
  7. Internally a notch hilum or hilus present, from this point renal artery enter, renal vein & ureter come out.
  8. Diameter of renal artery is more than other normal artery. Kidney is covered by a capsule.
  9. Outside capsule a fat layer of adipose capsule, followed by a fibrous membrane, i.e. renal fescia present.
  10. It is solid, made up of 10,00,000 nephrons or uriniferous tubules.
  11. In kidney outer part is cortex and inner part is medulla.

Cortex -

  1. It is granular due to presence of Malpighian's capsule.
  2. In between medullary rays of ferrin present. these are straight part of PCT and DCT.
  3. Cortex enters into medulla region between 2 pyramides, in the form of column of bertini.
  4. On their inenr side adipase tissue present.

Medulla -

  1. Inner part made up of 15-16 pyramids. (In rabbit, mapsupials, insectivorus rodents, pyramid i.e. unilobular)
  2. Central pointed part of pyramid is papillae. On papillae duct of bellini opens.
  3. Papillae open in calyces. Calyces open in the pelvis.
  4. From renal pelvis ureter is originated.
Posted Date: 10/2/2012 4:11:42 AM | Location : United States







Related Discussions:- Excretory system - kidney, Assignment Help, Ask Question on Excretory system - kidney, Get Answer, Expert's Help, Excretory system - kidney Discussions

Write discussion on Excretory system - kidney
Your posts are moderated
Related Questions
Circulatory system, closed is a system which uses a continuous series of the vessels of different sizes to deliver blood to body cells and return it back to the heart; it is found

Q. How are antivenoms produced? Why are antivenoms an example of passive immunization? Antivenoms are obtained by the following process: the venom (antigen) is inoculated into

Q. Nutritional Management for gastro oesophageal reflux disease? As mentioned above the nutrient requirements remain the same as per the RDI for most patients. It would be impo

What are antioxidants? To put it simply, antioxidants are important naturally occurring nutrients, (vitamins, minerals) which help to protect body from certain types of cancers

Q. What is the difference between vital and natural amino acids? Essential amino acids are those that the organism is not capable to synthesize and that need to be ingested by

Based on your reading of the article "New Life for Ancient DNA" which of the following is a  false statement in regards to the comparison among genes in extinct and living species?

Q. What are some evolutionary advantages of animals with complete digestive tube? The complete digestive tube permits animals to continuously feed themselves without waiting fo

What are the antigens and the respective antibodies of the ABO blood group system? The ABO blood system contain the erythrocytic antigens A and B that can be attacked by the an

Why are the tropical forests also known as stratified forests? In tropical forests tall trees of various species have their crowns forming a superior layer under which diverse

Explain the Interaction of Vitamin A with Vitamin E? Of the various nutrients, the interaction of vitamin E, proteins, zinc and iron with vitamin A is of significance. Know? Le