Answer: The correct option is D (Tunica externa, tunica media, tunica intima)
Explanation:
Blood vessels are channels through which blood is distributed to all the cells of the body. They are classified into 3 based on their structure and function. These includes;
- Arteries: They carry blood away from the heart.
- Capillaries: They help in exchange of materials between blood and tissue cells.
- Veins: They are known to carry blood towards the heart.
The walls of arteries and veins have the same three layers which includes;
1.) Tunica external: this is the outermost layer which consists of elastic and collagen.
2.) Tunica media: this is the middle layer which is made up of smooth muscle.
3.) Tunica intima: it's a simple squamous epithelium surrounded by connective tissue.
I hope this helps, thanks.
