Excretory system - kidney, Biology

Assignment Help:

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.

Related Discussions:- Excretory system - kidney

Hindbrain - medulla oblongata, MEDULL A OBLONGATA - Conical in appeara...

MEDULL A OBLONGATA - Conical in appearance. Lower most part of hind brain. It's lumen is metacoel or 4th ventricle. An oval mass pons virolli lies above medula oblongeta. I

What are the lethal genes, What are the lethal genes? The Lethal genes ...

What are the lethal genes? The Lethal genes are genes having at least one allele that, while present in the genotype of an individual, causes death. There are dominant lethal a

Illustrate steps of polymerase chain reaction , There are three steps of PC...

There are three steps of PCR a) Denaturation.  The reaction combination is heated to 95°C for a short time period (about 15-30 sec) to denature the goal DNA into one strands w

Extracted chlorophyll pigments, Extracted chlorophyll pigments If we...

Extracted chlorophyll pigments If we take chlorophyll molecule in a test tube and provide 2 CO and water and expose the mixture to sunlight, glucose is not formed. If we

Why it have been so difficult for radially symmetrical, Unlike bilaterally ...

Unlike bilaterally symmetrical animals, radially symmetrical animals are almost never able to move themselves from place to place. Why might it have been so difficult for radially

Lntracardiac hemodynamics, Provides one dimensional ("ice pick") view of...

Provides one dimensional ("ice pick") view of the heart only provides information with respect to the distance of each object from the transducer and no information in the l

Bitter taste, Q. Bitter Taste? Bitterness is an inherent property of a ...

Q. Bitter Taste? Bitterness is an inherent property of a substance. It is due to substances such as alkaloids present in food. For example, tannins present in tea, coffee, frui

Define distant osteogenesis, Q. Define Distant Osteogenesis? Distant Os...

Q. Define Distant Osteogenesis? Distant Osteogenesis : This type of healing has also been described to explain the phenomenon of "Osseointegration" of machined metallic implant

Genomic dna libraries , A genomic DNA library is made from the genomic DNA ...

A genomic DNA library is made from the genomic DNA of an organism. For instance, a mouse genomic library could be made by digesting mouse nuclear DNA with a restriction nuclease to

What is limnetic zone, Q. What is limnetic zone? The open water zone is...

Q. What is limnetic zone? The open water zone is called the limnetic zone. This represents the zone or depth of the water upto which sunlight can penetrate. Phytoplankton along

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd