This document discusses the structure and function of various cell and tissue types. It describes organelles like the Golgi apparatus and lysosomes, which package and transport proteins and aid intracellular digestion. It also discusses the four primary tissue types - epithelial, connective, muscle and nervous tissue - and goes into further detail about epithelial tissues and the different roles they play.

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Cell and Tissue ||
• Cell and Tissue
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2. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin CummingsCopyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
• Protein packaging
• Secretory vesicles
• Secreted to E C F
Golgi Apparatus
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Golgi Apparatus
Figure 3-11: The Golgi apparatus
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• Lysosomes
• Enzymes
• Intracellular
digestion
• Peroxisomes
• Hydrogen
peroxide
• Detoxification
• Fatty acid
degradation
Cytoplasmic Vesicles
Figure 3-12: Lysosomes and peroxisomes
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• Nuclear envelope
• Nuclear pore complex
• Chromatin
• DNA form genes
• Nucleoli
• DNA concentrations
• Control RNA synthesis
Nucleus
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Nucleus
Figure 3-13: The nucleus
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• Tissue defined:
• Matrix
• Tissue types
• Epithelial
• Connective
• Muscle
• Nervous
Primary Tissue Types
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• Cell to cell
• Gap junction
• Tight junction
• Anchoring junction
• Cell to matrix
• Focal adhesions
• Hemidesmosomes
Junctions
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Junctions
Figure 3-14: Types of cell junctions
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Key Junction Proteins:
Connexin, cadherins, occludin & integrins
Figure 3-15: A map of cell junctionsFor more Visit www.dentaltutor.in

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• Defined:
• Types:
• Exchange
• Transport
• Ciliated
• Protective
Epithelial Tissues
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Epithelial Tissues
Figure 3-17: Distribution of epithelia in the body
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• Leaky junctions
• Rapid transport
• Oxygen
• Carbon dioxide
• Ions & fluids
• Capillaries
• Lung alveoli
Exchange Epithelial Tissues
Figure 3-18a: Movement of substances across tight and leaky epithelia
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• Transport epithelium
• Intestinal microvili
• Tight junctions
• Ciliated epithelium
• Trachea
• Sweep mucous out
• Protective epithelium
• Skin
• Multiple cell layers
• Prevent exchange
More Epithelia
Figure 3-18b: Movement of substances across tight
and leaky epithelia
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• Ciliated epithelium
• Trachea
• Sweep mucous out
• Protective epithelium
• Skin
• Multiple cell layers
• Prevent exchange
More Epithelia
Figure 3-19a: Ciliated epithelia
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• Exocrine tissues
• Mucous glands- goblet cells
• Sweat glands
• Secreted externally
• Endocrine tissues
• Hormones
• Secreted to ECF & blood
Secretory Epithelia
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Secretory Epithelia
Figure 3-20: Goblet cellsFor more Visit www.dentaltutor.in

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Secretory Epithelia
Figure 3-21: Development of endocrine and exocrine glands from epithelium
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