Revision Notes For For Class 11 Biology Chapter 19 Excretory Products And Their Elimination

The process of removing or eliminating waste products of metabolism and other non-useful materials from a body of a living organism is termed as the Excretion. The entire process of elimination of wastes is controlled by the excretory system. The human excretory system includes specialized organs including a pair of kidneys, ureters, urinary bladder and urethra. These organs are located in the abdominal cavity. The skin, lungs, and liver also function as accessory excretory organs but the urinary system is considered as the main excretory organ which is involved in excretion of nitrogenous waste products, along with water and some mineral salts.

CBSE Class 11 Biology Chapter 19 Excretory Products And Their Elimination

Excretory System Modes of Excretion
Excretion In Humans Excretion And Its Importance
Human Excretory System Role Of Other Organs In Excretion

Frequently asked Questions on CBSE Class 11 Biology Notes Chapter 19: Excretory Products and their Elimination


What is an ‘Abdominal Cavity’?

The Abdominal boundary is the upper boundary is the diaphragm, a sheet of muscle and connective tissue that separates it from the chest cavity, its lower boundary is the upper plane of the pelvic cavity.


What are the parts of ‘the human excretory system’?

The important human excretory organs are- kidneys, ureter, urethra, urinary bladder, skin, liver, intestine and lungs.


What are ‘nitrogenous waste products’?

They are ammonia, urea, uric acid and creatinine. All of these substances are produced from protein metabolism.


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