Page 3 - Headlines Histology2024_Neat
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The Cell
• The cell is the structural and functional unit of all tissues.
• It consists of a mass of protoplasm divided into nucleus and cytoplasm.
• The cytoplasm is the part of protoplasm located around the nucleus
designed to perform synthetic and metabolic activities.
• It consists of structure's matrix (cytosol) suspended into it several different
kinds of cytoplasmic organelles and inclusions and supported by
cytoskeleton.
Cytoplasmic matrix
• The cytolplasmic matrix (cytosol) is the non-organelle component of the
cytoplasm occupying the intracellular spaces between organelles and
inclusions.
• It contains any soluble proteins, lipids, carbohydrates and small ions.
Cytoplasmic organelles
• They are permanent, living cytoplasmic structures that perform specific
functions.
• Two types of cytoplasmic organelles are recognized: membranous and
non-membranous organelles.
Membranous organelles
• The membranous organelles are cytoplasmic organelles that posses a
bounding membrane of their own and they include cell membrane,
mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and
peroxisomes.
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