The stem cells which have potency to give rise to all tissues and organs are formed from

Options

A. Trophoblast
B. Umbilical cord
C. Inner cell mass
D. Placenta

Answer

### Step-by-Step Solution:

1. **Understanding Stem Cells**:
- Stem cells are unique cells that have the ability to differentiate into various types of tissues and organs in the body. They are essential for growth, development, and repair.

2. **Identifying the Type of Stem Cells**:
- The question specifies stem cells that can give rise to all tissues and organs. These are known as **pluripotent stem cells**, specifically **human embryonic stem cells**.

3. **Origin of Human Embryonic Stem Cells**:
- Human embryonic stem cells are derived from the **inner cell mass of the blastocyst**. The blastocyst is an early-stage embryo that forms after fertilization.

4. **Structure of the Blastocyst**:
- The blastocyst consists of two main parts:
- The **inner cell mass**, which develops into the embryo and gives rise to all tissues and organs.
- The **trophoblast**, which forms the outer layer and contributes to the formation of the placenta.

5. **Conclusion**:
- Since the stem cells with the potency to form all tissues and organs arise from the inner cell mass, the correct answer to the question is that these stem cells are formed from the **inner cell mass of the blastocyst**.

### Final Answer:
The stem cells which have the potency to give rise to all tissues and organs are formed from the **inner cell mass of the blastocyst**.

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