https://www.123articleonline.com/rss/author/412720/nidhi-dubeyArticles written by Nidhi Dubey from 123ArticleOnline.comen-usCopyright (c) 123ArticleOnline.com All rights reserved. https://www.123articleonline.com/articles/1433662/what-is-the-circulatory-system The circulatory system encompasses a complex network of blood vessels. The heart is a muscular organ and it is made up of small tubules that run throughout our body. There are three types of small tubules that help to transport blood and carry the deoxygenated blood.