Excretory Flashcards
What is excretion?
removal of waste through lungs,skin, and kidneys
Lungs function
Exhale CO2 via cell respiration
Sweat glands function
Sweat and release H2O, Urea, and salt (in sweat)
Kidneys function
filters and cleans the blood to produce the waste known as urine.
What is urine high in?
Urea. It also contains some salt and water
3 of the functions of kidneys to maintain homeostasis :
- Regulate the volume, composition, and pH of body fluids
- Remove metabolic waste from the blood and eliminate them
- Regulate blood pressure and calcium ion absorption
Reabsorption
When the nutrients are filtered and sent back from the kidneys via renal vein to the inferior vena cava
Glomerulus
Bunch of capillaries that act as a filter letting small materials go in the nephron
Nephron
Composed of capillaries and tubules, it is where the waste is after all the filtering and goes to the duct to be released as urine
Excretion in kidney
Urine passes to collecting ducts in the nephron until it passes out of the kidney
Ureter
thin tubes that transport urine to the bladder
Bladder
smooth muscle that stores urine until excretion
Urethra
tubes that transports urine out of the body
Dialysis machine
Filters blood, used if ones kidneys don’t filter enough
Renal Vein
Send the filtered blood to the inferior vena cava of he heart
Renal Artery
Sends the blood that is not filtered to the kidney
What happens if the Renal Artery is blocked?
It can lead to kidney failure or hypertension (high blood pressure)
Bowman’s Capsule
Filters the blood from the glomelur capilaries
Loop of Henle
A spiral loop that filters and reabsorbs the nutrients, by capillaries on the loop
Proximal convoluted tubule
The tube closest to Bowman’s Capsule and links it to the loop of henle
Distal convoluted tubule
The tube farthest away from bowman’s capsule and links the loop of henle to the collecting duct
collecting duct
Takes the urine from the nephron and sends it to the renal pelvis and ureters
How does the blood from the renal artery enter Bowman’s capsule
Enters through glomerulus and into by diffusion
How to detect diabetes?
1.Sugar in Urine
2.Really thirsty
3.Fatigue
4.Sick
Type 1 diabetes
No insulin , allows sugar into cells
Parts of the nephron (8 parts)
-Bowman’s capsule
-Renal Artery (high in waste)
-Renal Vein (Clean blood)
-Glomerulus
-Proximal convoluted tubule
-Distal convoluted tubule
-loop of henle
-collecting tubule
