In man the foetal membrane which forms the intimate connection with the uterine tissue is

Options

A. Amnion only
B. Chorion only
C. Allantois only
D. Allanto–chorionic structure

Explanation

To answer the question regarding which fetal membrane forms an intimate connection with the uterine tissue in humans, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Fetal Membranes**: In humans, there are several fetal membranes, including the amnion, chorion, allantois, and yolk sac. Each of these has distinct functions and structures.

2. **Understand the Role of the Chorion**: The chorion is the outermost fetal membrane. It plays a crucial role in the implantation of the embryo into the uterine wall and is involved in the formation of the placenta.

3. **Examine the Connection with Uterine Tissue**: The chorion develops finger-like projections called chorionic villi. These villi penetrate the endometrial wall of the uterus, establishing a close connection with the maternal tissue.

4. **Conclude the Answer**: Since the question specifically asks for the fetal membrane that forms an intimate connection with the uterine tissue, the correct answer is the chorion. It is through the chorionic villi that the chorion connects with the endometrial wall, facilitating nutrient and gas exchange between the mother and the developing fetus.

### Final Answer:
The fetal membrane which forms the intimate connection with the uterine tissue in humans is the **chorion**.

---