The algae are simple photosynthetic plants that live in water. Most species are small to very tiny; many can only be seen with a microscope and often float or swim as plankton in the water column. But some algae--what we often call pond scum or seaweed--are conspicuous plants that can form dense mats of vegetation.
Circulatory System Diseases. Atherosclerosis â Literally, âhardening of the fatty stuff.â High fat diets can lead to formation of fatty plaques lining blood vessels. These fatty areas can become calcified and hard leading to arteriosclerosis, hardening of the arteries.
Knowledge center. Cardiovascular diseases include illnesses that involve the blood vessels (veins, arteries and capillaries) or the heart, or both-diseases that affect the cardiovascular system. The cardiovascular system, also called the circulatory system, is the system that moves blood throughout the human body.It is composed of the heart, arteries, veins, and capillaries. It transports oxygenated blood from the lungs and heart throughout the whole body through the arteries.xamples of diseases that affect the cardiovascular system. 1  Cardiac diseases (Heart diseases) - examples include: - 2  Angina (considered as both a cardiac and vascular disease). - 3  Arrhythmia (problems with the heartbeat, irregular heartbeat). - 4  Congenital heart disease. - 5  Coronary artery disease (CAD).