1. Which one of the following accurately pairs the blood vessel type with its function? A. Capillaries - work to exchange gases and nutrients with tissues B. Arteries - carry blood to the heart C. Veins - carry blood away from the heart D. Aorta - carry oxygen-poor blood only

A. Capillaries-work to exchange gases and nutrients with tissues.

capillaries are thin-walled vessels which facilitate the flow of blood through them. As blood flows slowly through capillaries, its thin walls allow for diffusion of gases and other materials from the blood and into surrounding tissues. It also allows for waste materials to diffuse from surrounding tissues into blood, so that it can be carried to excretory organs for removal.

Arteries carry blood away from the heart. Aorta, which is the largest artery, carries oxygen rich blood. Veins carry blood to the heart