Tunica media of an elastic artery is made up mainly

Options

A. Smooth muscle fibre
B. Loose alveolar tissue
C. Elastic fibers
D. Collagen fibres

Answer

To answer the question regarding what the tunica media of an elastic artery is mainly made up of, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure of an Artery**:
- An artery consists of three main layers: tunica intima (inner layer), tunica media (middle layer), and tunica externa (outer layer).
- The tunica media is specifically located between the tunica intima and tunica externa.

2. **Identifying the Composition of Tunica Media**:
- The tunica media is primarily responsible for the regulation of blood pressure and flow.
- It is composed of various types of tissues, including smooth muscle fibers and elastic fibers.

3. **Focusing on Elastic Arteries**:
- Elastic arteries, such as the aorta, have a tunica media that is rich in elastic fibers, allowing them to stretch and accommodate the surge of blood with each heartbeat.
- While smooth muscle fibers are present, the defining characteristic of elastic arteries is the abundance of elastic fibers.

4. **Choosing the Correct Answer**:
- Among the options provided:
- A) Smooth muscle fiber
- B) Loose alveolar tissue
- C) Elastic fibers
- D) Collagen fibers
- The correct answer is **C) Elastic fibers**, as they are the predominant component in the tunica media of elastic arteries.

### Final Answer:
The tunica media of an elastic artery is made up mainly of **elastic fibers**.