Question

The blood vessels are lined internally by a single layer of

• A. endothelium
• B. epithelium
• C. epidermis
• D. muscular layer

Answer 1

The correct option is A

endothelium

The correct option is A.

Structure of blood vessels:

1. Blood vessels circulate blood throughout your body. They help deliver oxygen to vital organs and tissues, and also remove waste products.
2. Blood vessels include veins, arteries, and capillaries.
3. The inner walls of a blood vessel such as are lined by a single layer of squamous cells called the endothelium.