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A functional pronephros develops in vertebrates that have a free-swimming larval stage in their development. [7] Pronephros functions in amphibians in the larval stage, in the adults of some bony fishes, and in the adults of some other fish species. [7] The pronephros is a vital organ in animals that go through the aquatic larval stage.
The renal calyces (sg. calyx) are conduits in the kidney through which urine passes. The minor calyces form a cup-shaped drain around the apex of the renal pyramids.Urine formed in the kidney passes through a renal papilla at the apex into the minor calyx; four or five minor calyces converge to form a major calyx through which urine passes into the renal pelvis (which in turn drains urine out ...
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This is an accepted version of this page This is the latest accepted revision, reviewed on 13 November 2024. This article is about the human urinary system. For urinary systems of other vertebrates, see Urinary systems of birds, urinary systems of reptiles, and urinary systems of amphibians. Anatomical system consisting of the kidneys, ureters, urinary bladder, and the urethra Urinary system 1 ...
The lungs are the part of respiratory system which helps to maintain acid–base homeostasis by regulating carbon dioxide (CO 2) concentration in the blood. The respiratory system is the first line of defense when the body experiences and acid–base problem. It attempts to return the body pH to a value of 7.4 by controlling the respiratory rate.
Urine is a liquid by-product of metabolism in humans and in many other animals. In placental mammals, urine flows from the kidneys through the ureters to the urinary bladder and exits the urethra through the penis or vulva during urination. In other vertebrates, urine is excreted through the cloaca. [1]
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Some desert animals have evolved greater ability to concentrate urine than other animals. [160] The most concentrated urine among the studied species is produced by the Australian hopping mouse Notomys alexis , [ 159 ] whose kidneys have longer loops of Henley and an elongated renal papilla compared to the kidneys of other mammals. [ 161 ]