Kidneys are responsible for filtering nitrogen and uric acid residues from the blood. These are sent through the ureters to one of the cloacal chambers since they are expelled to the outside.
Each consist of three lobes.
Found behind the lungs and on each side of the spine of birds.
Made up of a renal cortex and renal medulla, a microscopic examination of a dissected kidney shows how it is composed of a large number of renal tubules or nephrons.
Birds have two types of nephrons, Henlewing nephrons in the renal medulla (which help concentrate urine, and other reptilian nephrons located in the renal cortex.
A nephron is composed of a complex network of capillaries contained by a capsule, called Bowman’s capsule. In which blood is directly filtered, it also has a spiral segment ranging from the Bowman Capsule to the Henna Asa and finally have a Distal tubule which directs urine to the ureters for subsequent removal from the body.
1 of 2
excretory system
The ureters open and connect the excretory system and are located adjacent to the vas deferens of the male or female oviduct.
Since birds do not have a bladder the ureters must deposit the filtrate through the kidneys into the sewer chamber for storage.
Cloaca is an organ located at the bottom of the digestive, excretory and reproductive systems of birds and is used to expel faeces and lay eggs.
Unlike mammals and amphibians, birds do not have a bladder, excess water is absorbed by the intestine before the disposal of the waste.
Birds produce a thick paste with a low water content and a high content of uric acid, product of the nitrogen metabolism.
If one of the excretory system organs fails, the bird dies quickly of blood poisoning by high levels of urea.
Comments
No comments have yet been made