Question

multiple choice question
what are capillary walls composed of?

• simple squamous epithelium
• areolar connective tissue
• smooth muscle
• stratified squamous epithelium

Explanation:

Capillary walls are thin to allow for efficient gas and nutrient exchange. Simple squamous epithelium is a single - layer of flat cells, which is ideal for this function. Areolar connective tissue is more of a filler and support tissue, smooth muscle is for contraction in organs like blood vessels (but not the main component of capillary walls), and stratified squamous epithelium is multi - layered and not suitable for the thin structure of capillaries.

Answer:

Simple squamous epithelium