Advertisements
Advertisements
प्रश्न
Describe the mechanism of urine formation in human excretory system. Draw a labelled diagram to illustrate your answer.
Advertisements
उत्तर
Kidneys are the main excretory organ of the human body. There are about millions of nephron in each kidney. Each nephron contains a renal corpuscle and a renal tubule. The renal corpuscle consists of capillaries called the glomerulus, enclosed by a capsule called Bowman's capsule. The blood containing wastes (like urea) enters the glomerulus. The glomerulus filters the blood. During filtration, the filtrate (containing substances like glucose, amino acids, salts, water and urea) present in the blood travels through the renal tubule where materials needed by the body are reabsorbed, while the wastes like urea are collected and excreted in the urine. The nephron carries the urine into the collecting tubule of the kidney from where it is carried to the ureter. From the ureter, the urine passes into the urinary bladder. The urinary bladder stores the urine until it is forced out of the body, through an opening known as the urethra.
APPEARS IN
संबंधित प्रश्न
What gaseous waste products are excreted by plants?
State whether the following statement is true or false:
Some organisms store wastes in body parts.
A dialysis machine contains long tubes coiled in a tank containing dialysing solution
Name the main waste which passes into the dialysing solution.
What are the methods used by plants to get rid of their waste products?
The excretory unit in the human excretory system is called:
Fill in the blank.
.................. produces bile pigments from the heamoglobin of broken RBCs.
Name the following:
The outer region of kidney containing the Bowman's capsule.
Name the following:
The vein in which urea concentration is maximum
One of the following sets of body parts or substances or processed, pick out the one item which overall includes the remaining foir.
Skin, liver, lungs, kidneys, excretion.
Define the following term:
Osmoregulation
Answer the following question:
Explain the human excretory system with the help of a suitable diagram.
State the Location: Medulla of Kidney
Write the functional activity of the following structure: Renal artery
Write the functional activity of the following structure: Renal vein
Answer the following question.
Why do we get bad breath after eating garlic or raw onion?
Osmoregulation maintains the osmolarity of blood at about ______.
The number of ATP molecules required to produce one molecule of urea from the omithine cycle.
Plants use completely different process for excretion as compared to animals. Which one of the following processes is NOT followed by plants for excretion?
Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms?
