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Which of the following correctly orders the steps in liquid waste excretion?
A. Kidneys > Urethra > Urinary Bladder > Ureters
B. Kidneys > Ureters > Urinary Bladder > Urethra
C. Urethra > Urinary Bladder > Kidneys > Ureters
D. Ureters > Kidneys > Urinary Bladder > Urethra

Sagot :

mkim6926

Answer:

B. Kidneys > Ureters > Urinary Bladder > Urethra

Explanation:

PENN

The correct order in which liquid waste excretion, starting from the kidneys takes place is kidneys >Ureters >Urinary Bladder >Urethra. So, the correct option is B.

What is the process of liquid waste excretion?

The blood from various organs reaches the kidneys and is filtered there. The kidneys contain over a million very tiny structures known as nephrons. These are the designated regions of blood filtration. These nephrons are made of a glomerulus with a number of blood capillaries.

This process results in the formation of concentrated urine after glomerular filtration, reabsorption and secretion.

The secreted urine reaches the Urinary bladder through the Ureters connected to each of the kidneys. The Urinary bladder helps in storing the urine until it can be removed from the body through the urethra.

When the Urinary bladder is full, it creates something called the micturition reflex which creates the desire to expel urine. The urethral region is under voluntary control which means that a person can postpone performing the act of urination until they are in an acceptable position to do so.

Therefore, the correct option is B.

Read more about the excretory system, here

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