Question

question 9
label: arteriole
question 10
identify the structures associated with heart conduction: av node

Explanation:

Arterioles are small - diameter blood vessels that branch from arteries and lead to capillaries. In the given diagram of the vascular system, the arteriole is the red - colored vessel (indicating oxygenated blood) that branches from the larger artery and leads into the capillary network.

Answer:

B