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

Define the biochemical analysis, Biochemical analysis A basic metabolic...

Biochemical analysis A basic metabolic panel measures sodium, potassium, chloride, bicarbonate, blood urea nitrogen (BUN), magnesium, creatinine, and glucose. It also sometimes

Illustrate omega taxonomy, Q. Illustrate Omega Taxonomy? After synthesi...

Q. Illustrate Omega Taxonomy? After synthesising a basic classification, the taxonomist can attempt to improve upon it. Therefore, the observed facts are interpreted in Omega t

Higher calorific value (hcv) or gross calorific value (gcv), It is defined ...

It is defined as the total amount of heat produced, when unit mass/volume of the fuel has been burnt completely and the products have been cooled to room temperature (~ 15 0 C).

Meiosis, How do meiosis do in developing of new varieties of crops

How do meiosis do in developing of new varieties of crops

Explain extra cardiac conduit fontan, Explain Extra Cardiac Conduit Fontan ...

Explain Extra Cardiac Conduit Fontan ? This can be done with or without cardipulmonary bypass. First step is to make a bi-directional Glenn shunt. The main pulmonary artery is

Determine majority of segregation errors in human patients, Which of the fo...

Which of the following defines why the vast majority of segregation errors in human patients include the two sex chromosomes (XXY, XO, XYY) or chromosome 21 (triple 21)? A. The

Define transverse section of body of ascaris lumbricoides, Define Transvers...

Define Transverse section of body of ascaris lumbricoides? The transverse sections of male and female A, lumbricoides exhibit some differences based on their sex.   T.S. of Fema

Do echinoderms present external or internal fecundation, Q. Do echinoderms ...

Q. Do echinoderms present external or internal fecundation? Is there sex division among individuals? The fecundation in echinoderms is external, gametes are liberated in water

PROTOZOA, WHAT IS THE CLASSIFICATION OF PROTOZOA ..

WHAT IS THE CLASSIFICATION OF PROTOZOA ..

To show the direction of sprout growth in seeds, To show the direction of s...

To show the direction of sprout growth in seeds Soak pumpkin or other large seeds overnight and fasten three of them on needles as shown in the diagram. Fasten single with the

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