Human Excretory System

The video discusses the limited availability of fresh water and its use in waste management. It draws a parallel with the human body's excretory system, explaining how waste is removed through various processes. The video covers the excretion of nitrogenous waste like urea, the role of the excretory system, and how different animals excrete waste. It also explains kidney function and the dialysis process for those with kidney failure.

What is the primary purpose of water treatment plants?

• To store excess rainwater

• To desalinate seawater

• To clean water containing waste and impurities

• To increase the water supply

How does blood function similarly to water in the body?

• It circulates nutrients and collects waste

• It evaporates to cool the body

• It is stored in reservoirs

• It is used for digestion

Which system is responsible for removing feces from the body?

• Respiratory system

• Digestive system

• Circulatory system

• Nervous system

What is the main nitrogenous waste product excreted by humans?

• Ammonia

• Uric acid

• Urea

• Carbon dioxide

Which animals excrete waste in the form of uric acid?

• Fish

• Cows

• Lizards and birds

• Humans

What is the role of nephrons in the kidneys?

• To produce red blood cells

• To filter blood and collect waste

• To store urine

• To regulate body temperature

What is the function of a dialysis machine?

• To produce urine

• To remove toxic substances from the body

• To increase blood pressure

• To store excess blood