Structure Of Nephron: Renal corpuscle and Renal tubule | Biology Hubspot - Definition and Examples of Biology Terms

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Wednesday, February 27, 2019

Structure Of Nephron: Renal corpuscle and Renal tubule

Structure Of Nephron

The nephron is the structural and functional unit of the kidney. The nephron consists of two main parts viz. Renal corpuscle and Renal tubule.
The renal corpuscle helps in the filtration of blood plasma while as renal tubule acts as the receiving part of the filtered fluid.

Renal Corpuscle

Parts that constitute the renal corpuscle are glomerulus and glomerular capsule. The former is made up of the capillary network while as latter is a double-walled cup of epithelial tissue that envelops the glomerular network.

Renal Tubule

The renal tubule of the nephron consists of three parts namely proximal convoluted tubule(PCT), Loop of Henle, Distal convoluted tubule(DCT).

Proximal Convoluted Tubule

The proximal convoluted tubule of the nephron lies in the middle of the Bowman’s capsule and the U-turn Loop of Henle.
Its function is the resorption of various ions like Sodium, Chloride, and water from the filtrate.

Loop of Henle

The loop of Henle connects the proximal convoluted tubule (PCT) and distal convoluted tubule of the nephron. This part of the renal tubule consists of two limbs namely the descending loop of Henle and the ascending loop of Henle.
The part of the loop of Henle that dips into the renal medulla is called descending limb of the loop of Henle whereas the part that lies in the renal cortex is called the ascending loop of Henle.
The nephron is divided into two types based upon the location of the renal corpuscle and length of the loop of Henle. The two types are cortical nephron and juxtamedullary nephron.
The cortical nephron has a short loop of Henle and their renal corpuscle lies in the outer portion of the renal cortex. About 80-85% of the nephrons are cortical in nature.
The rest of the nephrons 15-25% are known as juxtamedullary nephrons. These nephrons have a long loop of Henle and their renal corpuscle lie deep within the cortex.

Distal Convoluted Tubule

The distal convoluted tubule of the nephron joins the loop of Henle with the collecting duct. The network of the collecting ducts unite and form papillary ducts which then drain into the minor calyces.
Collecting duct and papillary duct extend from the renal medulla of the nephron to the renal pelvis.

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