The seminal fluid coagulates on ejaculation due to

Options

A. proteins from seminal vesicle secretion
B. mucus from Cowper's gland
C. fibrinogen contents from seminal secretion
D. Secretion of epididymis

Answer

To solve the question "The seminal fluid coagulates on ejaculation due to," we can follow these steps:

### Step 1: Identify the Components of Seminal Fluid
The seminal fluid, also known as semen, is composed of secretions from various accessory glands in the male reproductive system. The primary contributors are the seminal vesicles, prostate gland, and bulbourethral glands.

**Hint:** Remember that seminal fluid is a mixture of secretions from different glands.

### Step 2: Understand the Role of Seminal Vesicles
The seminal vesicles are the largest accessory glands and contribute approximately 60% of the total volume of semen. Their secretions include fructose, prostaglandins, and clotting proteins.

**Hint:** Focus on the largest gland and its contributions to seminal fluid.

### Step 3: Analyze the Function of Clotting Proteins
The clotting proteins secreted by the seminal vesicles play a crucial role in coagulating the semen upon ejaculation. This coagulation helps to keep the sperm within the female reproductive tract, increasing the chances of fertilization.

**Hint:** Consider what happens to semen immediately after ejaculation.

### Step 4: Evaluate the Other Options
- **Mucus from the corpus gland:** This is not primarily responsible for coagulation.
- **Fibrinogen contents from seminal secretion:** While fibrinogen is a clotting factor, it is not the main component responsible for coagulation in this context.
- **Secretion of epididymis:** The epididymis is mainly involved in sperm maturation and storage, not in coagulation.

**Hint:** Assess each option critically to determine its relevance to the coagulation of seminal fluid.

### Step 5: Conclude with the Correct Answer
Based on the analysis, the correct answer is that the seminal fluid coagulates on ejaculation due to clotting proteins secreted by the seminal vesicles.

**Final Answer:** Clotting proteins from the seminal vesicle secretion.