Exertion is the removal toxic material waste product of metabolism and excess substance from organism .
Egestion is the passing out of undigested food as faces through the anus .
three major organ of exertion are skin ,kidney &lungs -:

Excretion vs. Egestion
Excretion and egestion are two different processes involved in the removal of waste products from the body. While both are essential for maintaining the overall health of an organism, they differ in terms of the substances being expelled and the mechanisms involved.

Excretion
- Definition: Excretion is the process by which metabolic waste products are removed from the body. These waste products include nitrogenous compounds like urea, excess salts, and toxins that are produced during cellular metabolism.
- Organs involved: Excretion mainly occurs in specialized organs such as the kidneys, liver, lungs, and skin. The kidneys filter blood to remove waste products and excess water, while the liver processes and eliminates toxins.
- Mechanism: Excretion involves active transport mechanisms to remove waste products from the body. For example, the kidneys filter blood through nephrons to produce urine, which is then excreted through the urinary system.
- Function: Excretion helps maintain the balance of electrolytes, water, and pH in the body. It also plays a crucial role in regulating blood pressure and removing harmful substances.

Egestion
- Definition: Egestion is the process of removing undigested food or indigestible material from the body. This includes feces, which are formed after the digestion of food in the digestive system.
- Organs involved: Egestion primarily occurs in the digestive system, particularly the large intestine, where feces are stored before being eliminated through the rectum.
- Mechanism: Egestion involves peristaltic movements of the intestines to push fecal matter towards the rectum. Once in the rectum, feces are expelled through the anus during defecation.
- Function: Egestion helps eliminate waste material that the body cannot digest or absorb. It also plays a role in maintaining the health of the digestive system by preventing the accumulation of toxins and harmful bacteria.
In summary, excretion is the process of removing metabolic waste products from the body, while egestion involves the elimination of undigested food material. Both processes are essential for maintaining the overall health and functioning of an organism.