The disease for the circulatory system is DVT (deep vein thrombosis)
http://www.everydayhealth.com, www.kenhub.com, http://study.com, www.cliffsnotes.com, www.nhlbi.nih.gov, http://www.heart.org, http://study.com, http://www.merckmanuals.com/, https://www.urmc.rochester.ed, Biology book pages 992-999