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
A laboratory mouse homozygous for an RFLP marker is mated to a wild mouse that is heterozygous for that marker. One of the heterozygous individuals resulting from this cross is mat

Explain process to Control of Breathing? The rate of breathing is controlled by the medulla, the segment of brain stem just above the spinal cord. If the brain stem is cut just

Nerve Cell - The Basic Unit The basic unit of the nervous system is the nerve cell or neuron. A neuron is to the nervous system what a brick is to the building. It has a cell

What is Eukaryotic Cells ? Eukaryotic Cells :  Most cells of higher organisms, and many unicells, contain a nucleus. Organisms whose cells contain a nucleus are called euka

What is the difference between ulcerative colitis and Crohn's disease? The differences between the two include: I) Anatomic distribution of the inflammatory process: Crohn'

Crown and bridge remover - Nash\Taylor temporary crown remover -morell remover -position the curved tip below the height of contour or at the margin of the crown -Apply seve

Hydrogen Transferring Coenzymes This group consists  of  three  important coenzymes  all of  which  assist different enzymes  in oxidation-reduction reactions. These are: a


Consider a time when the membrane voltage of a SA node cell in the heart is at its minimum value (near -80 mv).  At this time, A. all the voltage-gated calcium channels will be

The cerebrum is clearly the most interesting part of the brain from the point of view of cognitive neuroscience. The cerebrum consists of highly symmetrical left and right hemisphe