The Blood Vessels
1. Use the terms to complete the following:
away, capillaries, capillaries, exchange, oxygen-rich, towards, valves, veins,
a. Arteries – elastic vessels that carry blood _____________ from the heart.
b. Arterioles – smaller arteries that contain mainly smooth muscle in their walls. These are the ones that are capable of dilation and constriction. These carry
_________________blood from the arteries to the ________________.
c. Capillaries – are built for _________________. Filtration, osmosis and diffusion are the main mechanisms for movement through the pores and cells of the capillary.
d. Venules – venules connect _________________ to __________________.
e. Veins – carry blood _____________ the heart. These blood vessels contain
_________________ in their wall that prevent backflow of blood.
