BIO-GEO CHEMICAL CYCLE OR NUTRIENT CYCLE Bio - Living organism Geo - Rock, Soil, Air, Water Chemical - Material or Nutrients Cycle - Path All the types of material required by ecosystem in addition of energy, are available continuously to system through recycling. Thus there is a constant exchange of materials between the living organism and their abiotic environment through the recyling of materials. This phenomenon is called Bio-geo chemical cycle. Note: Environment factors,e.g soil , moisture, ph, temperature etc, regulate the release of nutrients into the atmosphere. Biochemical cycle The following types of cycle are found in an ecosystem. (i) Gaseous Cycle - C, H, N. O cycles. Reservoir is in the atmosphere (air) or in Hydrosphere(water). Sedimentary cycle - P. S, Ca cycles reservoirs are in earth's crust (lithosphere). Note : In these cycles, the bulk material remains in the inactive reservoir on earth crust like sediment of sea, or water
WBC WBC (White Blood Corpuscles) are also called as leucocytes because they are colourless. TLC- Total leucocyte count Number of WBC /mm 6000 - 8000/mm (2000-3000) DLC :- Differential leucocyte count: number/ (%) of different type of leucocyte in per cubic mm. of blood. Acidophils - 2-3% of TLC Basophils - 0.5% -1% TLC Neutrophils - 60 -65% TLC Monocytes - 6-8% TLC Lymphocytes - 20-25% TLC Leucocytosis :- Increase in TLC. This condition occur in bacterial & viral infection. Leucocytopenia :- Decrease in TLC. Normally TLC increases in bacterial & viral infection but in typhoid & AIDS, TLC decreases. Leukemia :- Abnormal increase in TLC (more than 1 Lakh) it is called as blood cancer. On the basis of nucleus & nature of cytoplasm, Leucocyte are of two type 1. Granulocytes a) In their cytoplasm granules are present which can be stained by specific dye. b) Nucleus is multilobed and lobes are interconnected by protoplasmic strand. c) D