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Urinary System

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Urinary System

Source: www.fairview.org Fig: Urinary System
Source: www.fairview.org
Fig: Urinary System

The urinary system means the discharge of liquid waste along with the solvable toxins and unnecessary materials in the form of urine. It is the important part of our excretory system. Urinary system helps to clear the excess liquid waste to maintain the balance of water in the body at the requirement level. In urinary system, we found a very important organ called kidney which helps in the circulation blood in the human body. There are many organs in the urinary system.

Organs of Urinary System

Some of the organs in urinary system are as follow:

Kidney

Source; www.medicinenet.com Fig: Kidney
Source; www.medicinenet.com
Fig: Kidney


A kidney is the most important part of the urinary system. There are two kidneys in the human body at the back of abdominal cavity on both sides of the backbone. They are like a bean in shape and are reddish brown in colour. There is two part of the kidney one is an external layer called Cortex and another is an internal layer called Medulla. Each kidney weight is about 150g.
Each kidney consists of a large number of tubules called nephrons which filtered the blood and urine. About 10 lakhs nephrons are there in each kidney. The purified blood is carried from the kidneys by the renal veins. The urine formed in the nephrons move downward the kidney by ureters and get collected in the urinary bladder. So, Nephrons are the structural and functional unit of the kidney.

Ureters

Source: www.infobarrel.com Fig: Ureters
Source: www.infobarrel.com
Fig: Ureters


Ureters are the tubes by which urine transfer from the kidney to the bladder. There are two ureters which are connected to the kidney to the urinary bladder. Each ureter is about 25-30 cm long which functions is to carry urine from kidney to urinary bladder.

Urinary Bladder

Source: www.englishfor2day.com Fig: Urinary Bladder
Source: www.englishfor2day.com
Fig: Urinary Bladder


The urinary bladder is a hollow muscular organ like sac, where urine is collected from the ureters. The urinary bladder starts outside by a tube called urethra. The urinary bladder has the capacity to hold up to500-700 ml urine but the human beings feel to urinate the urine when the bladder is about 300-400 ml filled. When the bladder is started to fill, we started to feel like doing urination.

Urethra

Source: www.organsofthebody.com Fig: Urethra
Source: www.organsofthebody.com
Fig: Urethra


The urethra is a long tube that connects the urinary bladder to the urinary meatus for the extraction of liquid from the body. It is about 20-25 cm long in male which throws urine, sperm, and semen during the ejaculation and it is about 4 cm long in the female which throws the only urine. It is also called the reproductive part of the male and female.

Process of Urine formation

The blood containing waste materials like an excess of water, urea, uric acid and other nitrogenous mixture etc enters in the kidney by a renal artery. The waste materials from the blood and the excess of water are absorbed by the nephrons and it converts them into the urine. Then the urine is transfer towards the ureters, then ureters collect the urine in the urinary bladder. When the urinary bladder get started to be filled, then human being started to feel for doing urination. The urine gets released through the urethra or reproductive part of the male and female.

Note: The urine is in yellow in colour due to the presence of urobilin , which is formed by the breakdown of red blood cells. Human beings can produce about 900 ml to 1800 ml urine per day but depending upon the human being how much fluid they inhale that changes urination in decrease or increase.



  • The urinary system means the discharge of liquid waste along with the solvable toxins and unnecessary materials in the form of urine. It is the important part of our excretory system. 
  • There are two kidneys in the human body at the back of abdominal cavity on both sides of the backbone. 
  • Each kidney consists of a large number of tubules called nephrons which filtered the blood and urine.
  • Nephrons are the structural and functional unit of the kidney.
  • Ureters are the tubes by which urine transfer from the kidney to the bladder.
  • The urinary bladder is a hollow muscular organ like sac, where urine is collected from the ureters. 
  • The urethra is a long tube  that connects the urinary bladder to the urinary meatus for the extraction of liquid from the body. 
.

Very Short Questions

The urinary system means the discharge of liquid waste along with the solvable toxins and unnecessary materials in the form of urine. It is the important part of our excretory system. The list of the organs that are in the urinary system are as follow: 

  • Kidney
  • Ureters
  • Urinary Bladder
  • Urethra

There are two kidneys in the human body at the back of abdominal cavity on both sides of the backbone. They are like a bean in shape and are reddish brown in colour. There is two part of the kidney one is an external layer called Cortex and another is an internal layer called Medulla. Each kidney weight is about 150g.

The functions of kidneys are as follow:

  • To remove excess of salt and water from the body.
  • To control the amount of water in the body.
  • To purify the blood.
  • To control blood pressure and form the blood.

The urinary bladder is a hollow muscular organ like sac, where urine is collected from the ureters. The urinary bladder has the capacity to hold up to500-700 ml urine but the human beings feel to urinate the urine when the bladder is about 300-400 ml filled. The function of the urinary bladder is to collect the urine from the kidney. 

0%
  • Each kidney weight is about ______ .

    ;i:3;s:9:
    ;i:2;s:9:
    ;i:1;s:16:
  • ______ means the discharge of liquid waste along with the solvable toxins and unnecessary materials in the form of urine.

    Urethra
    Kidney
    Urinary Bladder
    Urinary system
  • Each ureter is about ______ long which functions is to carry urine from kidney to urinary bladder.

    15-20 cm
    20-25 cm
    25-30 cm
    30-35 cm
  • The urinary bladder has the capacity to hold up to ______  urine.

    400-500 ml
    500-700 ml 
    300-500 ml
    500-600 ml
  • ______ is also called the reproductive part of the male and female.

    Ureters
    Urinary bladder
    Kidney
    Urethra
  • Each kidney consists of a large number of tubules called _______ .

    medulla
    renal veins
    nephrons
    cortex
  • There are _______  ureters which are connected to the kidney to the urinary bladder.

    ;i:2;s:4:
    ;i:3;s:4:
    two
  • The purified blood is carried from the kidneys by the ______ .

    nephrons
    medulla
    cortex
    renal veins
  • Human beings can produce about ______ urine per day

    900 ml to 1800 ml
    800 ml to 1700 ml
    600 ml to 1300 ml
    1200 ml to 1500 ml
  • ______ are the tubes by which urine transfer from the kidney to the bladder.

    Medulla
    Ureters
    Nephrons
    Urethra
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