A
Name two main organs of excretion in humans.
Skin, liver, lung, kidney.
What is the outer part of the kidney called?
Cortex
What process happens at the glomerulus?
Ultrafiltration
What waste is formed from protein breakdown?
urea
What happens if both kidneys stop working?
Waste builds up → death
Which organ removes carbon dioxide and water vapor?
What is the inner part of the kidney called?
Medulla
What process reabsorbs glucose and useful substances?
Reabsorbtion
What gas is excreted by lungs?
CO2
What is used to clean blood when kidneys fail?
Dialysis
What organ excretes urea, water, and salts?
Kidneys
What is the functional unit of the kidney?
Nephron
Which part of nephron carries out filtration?
Bowman's capsule
What liquid waste is produced by kidneys?
What would happen if the lungs stopped excreting carbon dioxide properly?
CO₂ would build up, causing blood to become acidic
What organ excretes sweat?
Skin
What are the cone-shaped structures in the medulla called?
Pyramid
What does the Loop of Henle help with?
Water reabsorbtion
Name two components found in sweat.
Explain how the skin helps regulate body temperature through excretion.
Sweat removes water and salts; evaporation cools the body.
Which organ removes toxic substances and old red blood cells?
Liver
What is the tube that carries urine from kidney to urinary bladder?
Ureter
Where is urine finally collected before leaving the kidney?
Collecting duct
What is the main nitrogenous waste in humans?
Urea
Trace the path of urine from kidney to outside the body.
Glomerulus → Bowman’s Capsule → Proximal Tubule → Loop of Henle → Distal Tubule → Collecting Duct → Ureter → Urinary Bladder → Urethra