Question

Which organ systems expel or excrete waste?

Answer 1

The EXCRETORY SYSTEM is responsible for our body excretion:

to maintain homeostasis, human removes wastes and excess water from the body to prevent any damage to the body.

organs involved in the system:

Skin:

• excretes through producing sweat by sweat glands present in dermis
• eliminates excess water, some amount of salt and urea and maintain homeostasis

Liver:

• breaks down many substances in blood including toxin
• transforms ammonia into urea which is filtered by kidney and passed in urine

large intestine:

• final organ of gastrointestinal tract
• eliminates solid waste
• extraction of water from indigestable food waste
• bile secreted into GI

Lungs:

• excretion of gaseous waste from the body
• eliminating carbon dioxide, maintaining acid-base homeostasis
• also eliminates water vapor

Kidney:

• known as the main organs of excretion.
• elimination of excess water and wastes from the bloodstream by the production of the liquid waste known as urine is the main primary function.
• structural and functional units of the kidneys are tiny structures called nephrons. They filter materials out of the blood, return to the blood what is needed, and excrete the rest as urine.