What are the Different parts of the excretory system?
There are many different parts of the excretory system which help in the process of excretion of urine. They are as follows:
(i) Kidneys
- The kidneys are placed on either side of the lumbar region of the
- They are protected by Ribs.
Position of the kidneys
- Kidneys are Bean Shaped Each kidney is approximately 11 cm long and 4-5 cm in width. They are reddish-brown in colour.
- Kidneys are enclosed in a thin covering called Tissue Capsule. This covering protects the kidneys from damage and prevents direct contact with other parts of the
Tissue capsule
- Hilum
- The hilum is the middle surface of both the
- It is the part where the blood vessels enter the
Hilum
- Ureter
- The ureter is the tube that begins from the inner part of the kidneys and ends at the backside of the urinary
- It carries the urine produced by the kidneys to the urinary
(iv) Urinary bladder
- The urinary bladder is a muscular organ that collects
- It has valves to prevent the backflow of
- The urinary bladder has a tight ring of muscles called the Sphincter. This prevents involuntary outflow of
(v) Urethra
- The urethra is a muscular
- It is open at the end to pass the urine out of the
(vi) Renal artery
- A renal artery carries oxygenated blood into the
- This blood contains toxic nitrogenous waste dissolved in
(vii) Renal vein
- A renal vein carries out the deoxygenated blood from the
- This blood does not contain toxic
