CLASS IX NCERT SCIENCE Chapter 5 Fundamental Unit of Life : Cell
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Are all cells alike??? Prepare a temporary mount of onion peel with different sizes We observe similar small structures and together they form a big structure onion bulb. Do all cells look alike in terms of shape and size????
To prepare stained temporary mount of onion peel Procedure Cell wal ell membrane Nucleus Cytoplasm
Shape and Size cells of multicellular organism are different in shape and size. shape and size of cells are related to the specific function they perform Some cells like amoeba have changing shapes. Some can have a more or less fixed type of shape for example nerve cell
AMOEBA Nerve Cell PHAGOSOMES ESCAPED BACTERIUM Nucleus Nerve Axon Amoeba Cell membrane Cytoplasm
Cell shape-variable. NERVE CELL MUSCLE CELLS BONE CELL Striated (voluntary) Smooth (involuntary) ardiac Ovum GLAND CELLS BLOOD CELLS White blood cells Red blood cells Lymphocyte Monocyte REPRODUCTIVE CELLS Neutrophil Eosinophil Basophil
O Cell size- a) Different for prokaryotic and eukaryotic organisms. b) Mycoplasma gallicepticum smallest cell known c) Ostrich eggs largest cell known. DNA Membrane 008 OYO 0 00.0 Ribosome Mycoplasma Ostrich Egg
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