The excretory system includes the skin, lungs, liver and kidneys and excretes metabolic wastes from the body.
What are the parts of the excretory system?
The skin, lungs and kidneys
The kidneys, stomach and lungs
The skin, lungs, liver and kidneys
What is the role of the skin in excretion?
Excretes excess water
Excretes salt
Excretes a small amount of urea in sweat
All of the above
The lungs excrete carbon dioxide and small amounts of water vapor.
The liver converts potentially dangerous nitrogen wastes, a product of protein breakdown , into less toxic urea.
The kidneys are a pair of fist sized organs located on either side of the spinal column near the lower back.
The kidneys produce and excrete a waste product known as urine.
These transport urine from the kidneys to the urinary bladder.
Bladder
Ureters
Urethra
The urinary bladder is where the urine is stored
Urine is released through the urethra.
A waste laden blood enters the kidney through the renal artery, the kidney removes urea, excess water and minerals and other waste products
Nephrons are the individual processing units in the kidneys that do most of the work
Blood purification in the kidneys is a complex process and involves
Filtration
Filtration and reabsorption
Filtration is the passing of a liquid or a gas through a filter to remove wastes.
A glomerulus is..
A small but dense network of capillaries or very small blood vessels encases in the upper end of each nephron
Bowman's capsule
Nephron
Bowman's capsule is a hollo, cup shaped structure that encases the glomerulus
The material that is filtered from the blood is called
Glomerulus
Filtrate
Nearly all the material that moves into Bowman's capsule makes its way back into the blood.
The process by which water and dissolved substances are taken back into the blood is called
Reabsorption
The kidneys first throw away everything and then takes back only what the body needs.
A section of the nephron tubule is called the loop of Henle and its job is to conserve water
The waste material now called urine that remains in the tubule is emptied into a collecting duct and from there the urine flows to the ureter of each kidney.
The ureters carry urine to the urinary bladder for storage until the urine leaves the body through the urethra.
The kidneys play an important role in maintaining homeostasis.
The kidneys
Respond directly to the composition of the blood
Are influenced by the endocrine system
None of the above
Problems with the kidneys include
Kidney stones
Kidney damage
Kidney failure
