Excretory System Flashcards
What kind of unwanted waste is eliminated from body in excretory system?
Nitrogenous waste
Ammonotelic excretory system. Substance? Animals?
Ammonia as main substance. Aquatic animals are ammonotelic
Uroletic excretory system. Animals? Substance?
All mammals. Urea.
Uricoletic excretory system. Substance? Animals?
Uric acid. Birds and reptiles.
What are the three types of excretory systems in animals?
Ammonetic ammonia aquatic
Ureotelic urea mammals
Uricotelic uric acid birds and reptiles
Order of toxicity of different substances of excretory systems?
Ammonia > urea > uric acid
What is the main excretory organ in humans
Kidneys
Draw nephron
Ban gaya dhang se?
Where are kidneys located in human
A pair of kidneys is located on the posterior side of abdominal cavity on the both sides of vertebral column
A kidney is made up of several Functional units they are called
Nephrons
What is the cup shaped bag found in the upper portion of the nephron
Bowmans capsule
What does a Bowmans capsule consist of
Afferent arterioles and efferent arterioles
What are afferent arterioles?
Take info from body towards central excretory system
What are efferent arterioles
Takes info from central system to body
The two arterioles in bowmans capsule from what?
Glomerulus
Where does ultrafiltration happen in kidneys?
Glomerulus
Function of glomerulus?
Ultrafiltration. Excess impurities in body are filtered here
Path of filtrate from bowman’s capsule to collecting duct?
Bowman’s capsule PCT Henle’s loop (via descending limb) Then DCT (via ascending limb) Then collecting duct
Which part of nephron reabsorbs water, minerals etc?
PCT, DCT and henle’s loop
Ureter function?
Filtrate travels from duct to urinary bladder via ureter
The unabsorbed filtrate after PCT DCT and henle’s Loop have absorbed the important minerals and water where does it remain Before this the waste containing liquid forms urine
In renal tubules
Where does the urine come out of?
Urethra
What are other excretory organs except the main urea excretory system?
Lungs excrete CO2
Liver excretes bilirubin, biliverdin, steroid hormones
Skin excretes sweat (salts, urea, lactic acid), and sebum
Why is urine yellow
Urine is yellow due to urochrome
