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 develop into different types of cells in the body. They can give rise to all tissues and organs.

2. **Types of Stem Cells**: There are various types of stem cells, but the focus here is on those that can differentiate into any cell type, known as pluripotent stem cells.

3. **Formation of Stem Cells**: In humans, pluripotent stem cells are derived from the early stages of embryonic development. Specifically, they originate from a structure known as the blastocyst.

4. **Blastocyst Structure**: The blastocyst is a hollow sphere of cells that forms after fertilization and consists of two main parts: the outer layer (trophoblast) and the inner cell mass.

5. **Inner Cell Mass**: The inner cell mass of the blastocyst is the group of cells that will eventually develop into the embryo itself. These cells are the source of embryonic stem cells.

6. **Conclusion**: Therefore, the stem cells that have the potency to give rise to all tissues and organs 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.

---