Excretory System Flashcards
What is excretion?
Removal of metabolic wastes of an organism
Wastes that are removed include carbon dioxide, water, salt, urea and uric acid
Or excreted wastes travel at some time in the bloodstream.
What are the organs in working in the excretory system and name shortly what its function is?
Lungs remove excess carbon dioxide
Liver produce urea and uric acid as a byproduct of the breakdown of proteins.
Skin removal of excess water, salt, urea and uric acid.
Urinary system kidneys filter the blood to form urine, which is excess water, salt, urea and uric acid.
What is the two layers of the skin?
The epidermis and the dermis.
What is the function of the skin?
Excretion Waterproofing Protection from diseases Protection from ultraviolet rays Regulation of body temperature Sensory detection
What is the urinary system?
An organ system that produces, stores and illuminates urine.
Out of what parts does the human urinary system consist?
Two kidneys, two ureters, the bladder and the urethra.
What is urea?
A waste product which is produced when foods containing protein, such as meat, poultry and certain vegetables are broken down in the body.
How do the kidneys work?
Oxygen rich blood-renal artery to kideys
Filtered by nephrons
Urea, other waste products form urine and pass through nephrons and down renal tubules of kidney.
Oxygen poor blood- exits kidney through renal veins. Down ureters into bladder. Sphincters ke p urine from leaking( muscles close tightly like a rubber band around opening of bladder into urethra ) then down the urethra tube that allows urine to pass outside the body.
What role does the kidneys play to keep the balance in your body?
Kidneys also balance the volume of fluids and minerals in the body. This balance in the body is called homeostasis.
