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Olin [163]
3 years ago
14

What is the sequence of layers of the blood vessels (veins or arteries) from outside to the inside? A. Tunica intima, tunica med

ia, tunica externa B. Tunica externa, tunica intima, tunica media C. Tunica intima, tunica media, tunica externa D. Tunica externa, tunica media, tunica intima E. Tunica media, tunica externa, tunica intima
Biology
1 answer:
Rashid [163]3 years ago
3 0

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.

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