Mention the function of trophoblast in human embryo.

Explanation

### Step-by-Step Solution:

1. **Understanding the Formation of the Embryo**: The human embryo begins as a zygote, which is formed when a sperm fertilizes an egg. This zygote undergoes cleavage, a series of rapid cell divisions.

2. **Formation of the Blastocyst**: After several rounds of division, the zygote develops into a structure called the blastocyst. The blastocyst consists of an outer layer of cells and an inner cell mass.

3. **Identifying the Trophoblast**: The outer layer of the blastocyst is known as the trophoblast. This layer plays a crucial role in the early stages of embryonic development.

...