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.
The heart lies at the center of the circulatory system, functionally speaking, and is responsible for circulating blood throughout the body. Since cells depend on blood supply to receive nutrients and oxygen, heart disease that affects the function of the circulatory system can be quite dangerous. There are a number of effects that heart disease can have on the circulatory system itself.