The following are absent in case of upper one third part of oesophagus, except

Options

A. Visceral peritoneum (Serosa)
B. Degestive gland
C. Myenteric plexus
D. Skeletal muscles

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which structures are absent in the upper one-third part of the esophagus, except for one. We need to identify the correct option that is present in this region.

2. **Analyzing the Options**:
- **Visceral Peritoneum**: This is a membrane that lines the abdominal cavity and is associated with abdominal organs. It is not present in the esophagus, particularly in the upper one-third. Thus, this option is incorrect.
- **Digestive Glands**: These glands secrete digestive juices containing enzymes for digestion. They are primarily found in the stomach and small intestine, not in the esophagus. Therefore, this option is also incorrect.
- **Meissner's Plexus**: This is part of the enteric nervous system that controls digestive processes, primarily found in the intestines. It is not present in the upper one-third of the esophagus. Hence, this option is incorrect as well.
- **Skeletal Muscle**: The upper one-third of the esophagus is composed of skeletal muscle, which is voluntary and aids in the movement of food. This is the correct option as it is present in the upper part of the esophagus.

3. **Conclusion**: The correct answer to the question is **Skeletal Muscle**, as it is the only structure present in the upper one-third of the esophagus among the given options.

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