The cubic kilometer is a metric unit of volume equal to 1,000,000,000 cubic meters. The symbol of the cubic kilometer is kmÂ³ . km3 = 1,000,000,000 m3 = 109 m3. To convert cubic kilometers to hmÂ³, damÂ³, mÂ³, dmÂ³, cmÂ³ and mmÂ³ , multiply by one followed by as many trios of zeros as there are places between the cubic kilometer and the other unit.
Rod photoreceptors are very sensitive to light and are responsible for night vision. These are the most abundant cell type in the human retina and are located closest to the back of the eye, near the retinal pigmented epithelium (RPE).
1 20. 2  NEUTROPHILSï These cells are the most abundant type of white blood cells in mammals and form an essential part of the innate immune system.ï In general, they are referred to as either neutrophils or polymorphonuclear neutrophils, and are subdivided into segmented neutrophils and banded neutrophils. 3  21. ANTIGEN-PRESENTING CELLSï These are group of diverse cell types that assists other cells in the Immune Response.ï Cells which do not have antigen-specific receptors. 2  Instead, they capture and process antigens, present them to T cell receptors.ï These cells include Macrophages, B Cells and Dentritic cells. 3  10.