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Circulatory System


Artery ___ look hollow and round and have thick walls. the thick walls have layers of muscles for moving blood through the body. ___ carry blood away from the heart.
Vein ___ have thinner walls than Arteries. ___ carry blood toward the heart.
Blood On the surface of a blood cell there are red dots- red blood cells. The purple blobs are the nuclei of white blood cells. Red blood cells carry oxygen to body cells. White blood cells help your body fight diseases.
Heart The muscle fibers are cardiac muscles. they are from the ___. The ___ muscle pumps constantly without you thinking about it. It pumps blood to deliver oxygen to body cells and collect waste.
Created by: JulianStudy