A mixed tideâtwo uneven tides a day, or one high and one lowâis also possible. Tides vary on timescales ranging from hours to years due to a number of factors. To make accurate records, tide gauges at fixed stations measure water level over time.
Top 10 facts about the world. Oligodendrocytes, also known as oligodendroglia, are a type of brain cell in the central nervous system that belongs to the glial cell family. The main purpose of glial cells is maintenance and support of nervous system cells.
Making the world better, one answer at a time. Blood brain barrier is formed by specific nueroglial cells called astrocytes.These astrocytes are of two types :1) Fibrous astrocytes and 2) protoplasmic astrocytes.The fibres of these astrocytes forms a network with capillaries of blood vessels that supply blood to brain.aking the world better, one answer at a time. Blood brain barrier is formed by specific nueroglial cells called astrocytes.These astrocytes are of two types :1) Fibrous astrocytes and 2) protoplasmic astrocytes.