The parts of human excretory system are given below. (i) Bladder
(i) Bladder (ii) Kidney (iii) Ureter (iv) Urethra
In which order does urine pass through these structures?

Options

A. (ii) (iii) (i) (iv)
B. (i) (iii) (iv) (ii)
C. (ii) (iv) (i) (iii)
D. (iv) (iii) (i) (ii)

Explanation

To determine the order in which urine passes through the structures of the human excretory system, we can follow these steps:

1. **Identify the Structures**: The parts of the human excretory system mentioned are:
- Kidney
- Ureter
- Bladder
- Urethra

2. **Understand the Function of Each Structure**:
- **Kidney**: The kidneys are responsible for filtering blood and producing urine. This is where urine is formed.
- **Ureter**: The ureters are tube-like structures that transport urine from the kidneys to the bladder.
- **Bladder**: The bladder is a storage organ that holds urine until it is ready to be expelled from the body.
- **Urethra**: The urethra is the tube through which urine exits the body from the bladder.

3. **Determine the Sequence of Urine Flow**:
- Urine is first produced in the **Kidney**.
- It then travels down the **Ureter** to reach the **Bladder**.
- Finally, when the bladder is full and ready to expel the urine, it passes through the **Urethra** and exits the body.

4. **Final Order**: Therefore, the order in which urine passes through these structures is:
- Kidney → Ureter → Bladder → Urethra