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.
Cardiovascular disease refers to several diseases that affect your heart and blood vessels. Cardiovascular disease (CVD) is not one single disease or condition. It is a group of different disorders that affect your heart and blood vessels.ypes of Cardiovascular Disease in the Heart. 1  Angina pectoris, or just angina, including: 2  Stable angina. 3  Unstable angina. 4  Variant angina (also known as Prinzmetal's angina). 5  Arrhythmias, which are problems with the heart's electrical system that can cause fast, slow, or irregular heartbeats. 6  These include: 7  Atrial fibrillation.