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

Consists of the production of atp, Select all that are true/correct: Cellul...

Select all that are true/correct: Cellular respiration consists of the production of ATP in several steps using enzymes. Photosynthesis produces carbohydrates using carbon dioxide

Why is the cerebellum more developed in mammals, Why is the cerebellum more...

Why is the cerebellum more developed in mammals that jump or fly? The cerebellum is the major brain structure that coordinates the movement and the equilibrium of the body. For

What do you know about tricuspid stenosis, Q. What do you know about Tricus...

Q. What do you know about Tricuspid stenosis? It is rare disease, with rheumatic etiology seen in 90 per cent of cases. In patients with rheumatic mitral stenosis only 3-5 per

Show the collection of primary samples of grain, Q. Show the Collection of ...

Q. Show the Collection of Primary Samples of grain? Sampling of grains begins with the collection of the primary sample i.e. sample of the consignment. The process involved in

Which hormone secreted by the growing ovarian follicles, Q. What is the hor...

Q. What is the hormone secreted by the growing ovarian follicles? What is the action of that hormone upon the uterus? The follicles that are growing after menses secrete estrog

Sketch arctic antifreeze protein and dna, When I had predicted into class, ...

When I had predicted into class, we had a huge snow storm this weekend. Now what I want you to do are to engineer several grass for my yard therefore my grass never lets snow accum

Describe the basic mechanisms in plaque formation, Q. Describe the Basic Me...

Q. Describe the Basic Mechanisms in Plaque Formation? In experimental models and human disease, the first morphologic phenomenon observed in plaque formation is adhesion of mon

Asexual reproduction, Which type of asexual reproduction takes place in mon...

Which type of asexual reproduction takes place in monocystis?

How are chromosomes classified, How is the chromosome region where the cent...

How is the chromosome region where the centromere is located called? How are chromosomes classified in relation to the position of their centromere? The chromosome region where

How cad patients response in hypertenstion, Q. How CAD Patients Response in...

Q. How CAD Patients Response in Hypertenstion? An exercise rise in systolic blood pressure (over 200 mm Hg) has been used as a reason to terminate exercise in some centers. She

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