Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Vertebrate Kidney
Typically, all vertebrates have a pair of kidneys, which function on the filtration - reabsorption - secretion principle. Only in a few teleost fishes, the kidney is aglomerular (without a glomerulus) and functions on the absorption - reabsorption - secretion principle as in the malpighian tubules of insects. The functional unit of the vertebrate kidney is the nephron or the uriniferous tubule. A small fish may have only a few dozen nephrons in its kidneys; a large mammal may have several million. A mammalis nephron begins with the renal corpuscle or the Malpighian body which consists of a double-walled cup, the Bowman's capsule, enclosing a knot of blood capillaries called glomeplus.
Figure: Schematic diagram of mammalian kidney and nephoron
Blood is brought to the kidney by the renal artery which branches and sub-branches into interloper arteries and finally into the afferent arteriole which gives rise to the capillary network of the glomerulus. An efferent arteriole formed by the confluence of the capillaries takes blood away from the Bowman's capsule. The Bowman's capsule latter continues into a long convoluted tubule which is distinguished into the proximal and distal convoluted tubules respectively. The distal convoluted tubules from different nephorons join to form the collecting tubule which carry the urine into the renal pelvis from where the ureter starts. The proximal and distal tubules are present in all vertebrates, but in birds and mammals a new U-shaped hair-pin-like segment called Henle's loop is present between proximal and the distal tubules. In the following section we shall study structural variations in the vertebrate kidney.
Respiration - Metabolism of Pollen Tubes In the unpollinated pistils of Hippeastrum hybridum very high O 2 , tension exists from stigma down through most of the style. During
A horticulturist keeps Chrysanthemum plants in short-day conditions during long-day season. State its effect on flowering. Specify the role of phytochrome included. Explain glom
Q. Is the epithelium vascularized? How do oxygen and nutrients reach the epithelium? Why is this feature an important evolutionary acquisition? Epithelia are not vascularized c
Each of the properties that follow is characteristic of the carbon atom. In each case, indicate how the property contributes to the role of the carbon atom as the most important at
Q. Calculate ideal weight for a diabetic patient? We now know that diabetes is the outcome of many genetic and environmental factors. The former is not in our control but the l
Jennifer has the "stomach flu" that is going around campus and has been vomiting profusely for the past 24 hours. Not only has she been unable to keep down fluids or food but she h
State three ways in which the absorbing surface of the small intestine is increased. The absorbing surface of the small intestine is increased by:- (a) being very long
What can I do with this topic to make it into a brochure
Slow walking or Crawling This type of locomotion is seen while the animal moves on the substratum. It involves a metachronal rhythm of action in the parapodia. Each fifth or
It is a category of viruses having RNA genome and reverse transcriptase enzyme within virus cuspid.
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd