Excretory System

The system that regulate the chemical composition of body fluids by removing metabolic wastes and retaining the proper amounts of water, salts, and nutrients.

• Digestive System

• Respiratory System

• Circulatory System

• Excretory System

The four functions of the excretory system are -

• get rid of wastes

• eliminate useless byproducts excreted by the cells

• eradicate harmful chemical buildups

• maintain steady, balanced chemical concentration in the body

• It cleans wastes gases like carbon dioxide from the blood

It filters wastes and purify blood.

• kidneys

• lungs

• heart

It is a hollow organ with distensible walls. It has a folded internal lining (known as rugae), which allows it to accommodate up to 400-600ml of urine in healthy adults.

• bladder

• ureter

• urethra

These narrow tubes carry urine from the kidneys to the bladder.

• ureters

• fallopian tubes

• alimentary canal

This tube allows urine to pass outside the body.

• ureters

• bladder

• urethra

The structure that actually produces urine in the process of removing waste and excess substances from the blood.

• Nephron

• Neurons

• Nerves

The nephron uses four mechanisms to convert blood into urine -

• filtration

• reabsorption

• secretion

• excretion

• conception

It delivers the urine to the bladder.

• ureters

• urethra

• urinary bladder

It travels out of the body through a hole called urethra.

• urine

• blood

• air