Name the process through which much needed oxygen is supplied to all the cells of body ?

Options

A. Diffusion
B. Endosmosis
C. Exosmosis
D. Counter current

Answer

To solve the question, "Name the process through which much needed oxygen is supplied to all the cells of the body," we can follow these steps:

### Step 1: Understand the Question
The question asks for the specific process that delivers oxygen to the cells in the body.

**Hint:** Focus on the mechanisms of gas exchange in the body.

### Step 2: Identify the Options
The options provided are:
- Diffusion
- Osmosis
- Exosmosis
- Counter current

**Hint:** Consider the definitions and functions of each process listed.

### Step 3: Analyze Each Option
- **Osmosis:** This process involves the movement of water across a semipermeable membrane and is limited to liquid. Therefore, it does not apply to the transport of gases like oxygen.

- **Diffusion:** This is the spontaneous movement of molecules from an area of higher concentration to an area of lower concentration. In the context of oxygen, it allows oxygen to move from the alveoli (where it is in higher concentration) into the blood (where it is in lower concentration). This process does not require energy.

- **Exosmosis:** This term generally refers to the movement of substances out of a cell, which is not relevant to the delivery of oxygen to cells.

- **Counter Current:** This refers to the flow of two fluids in opposite directions, often seen in gills of fish for efficient gas exchange, but it is not the primary process for oxygen delivery in the human body.

**Hint:** Eliminate the options that do not pertain to gas exchange.

### Step 4: Conclusion
After analyzing the options, the correct answer is **Diffusion**. This process is essential for the transport of oxygen from the lungs to the blood and subsequently to all cells in the body.

**Final Answer:** The process through which much needed oxygen is supplied to all the cells of the body is **Diffusion**.