Definition. A fibroblast is a cell that manufactures and maintains connective tissue, the structural framework that supports the organs of all animals. Fibroblasts secrete fibrous proteins and ground substance, which together form the extracellular matrix that is the basis of connective tissue. fibroblast is a cell that manufactures and maintains connective tissue, the structural framework that supports the organs of all animals.
Therefore, there is very little chlorophyll in these tropical waters, keeping them clear. (As an aside, corals are symbioses where phytoplankton have evolved to survive in nutrient-poor tropical waters by living inside the bodies of the corals and obtaining nutrients directly from the waste products of the corals.
According to the NIWA research results, visibility in the lake is up to 80 metres (262 ft) â meaning the water is considered almost as âoptically clearâ as distilled water. All images courtesy of Klaus Thymann of Project Pressure and supported by the Department of Conservation, NIWA and Tourism New Zealand.