Tissues

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Tissues

• Distinguish the four tissue types.

- epithelial, connective, nervous and muscle
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Case Neonatal Jaundice
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Epithelial tissue objectives

• Draw an epithelium, labeling cell junctions and
  the apical basal membranes.
• Explain the role of different epithelial types
  and different junction types.

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• Epithelia - cover body surfaces and line body
  cavities (lumen), form glands

Functions of epithelial cells include
movement of materials in and out of the body.
protection of the internal environment against
the external. secretion of a product.
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• Characteristics of epithelial cells
• They are contiguous (attached to one another).
• The cells rest on the basement membrane, an
  extracellular matrix they produce.
• They often have two different sides
• - apical side towards the lumen
• - basal side towards extracellular
  fluid
• Note these cells are polarized, meaning the two
  cell surfaces have different functions.

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Types of epithelial tissues

• - exchange
• - transporting
• - protective
• - ciliated
• - secretory
• exocrine
• - mucus, saliva, earwax, milk, oil, digestive
  enzymes
• endocrine
• - hormones

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Digestive tract - example organ with multiple
tissues

• 1.2. Smooth muscle
• 3. Transporting epithelium
• 4. Secretory epithelium (goblet cell)
• 5. Lumen

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Connective tissue objectives

• List the basic components of connective tissue
  and their contribution to tissue function.
• Name and describe the different connective tissue
  types.

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Connective tissues support, connect, protect,
strengthen and insulate other tissues.

• Composed of
• specialized cells and their extracellular
  products
• Connective tissue type depends on
• type of cell specialization
• type and arrangement of protein fibers
• type of ground substance

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elastin - gives flexibility
collagen - gives strength
Two fiber types in connective tissue
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Loose connective tissue
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Dense regular connective tissue
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Cartilage
Adipose (fat)
Blood
Bone
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For Monday

• Review epithelial and connective tissue
• Begin Chapter 5 - cell membrane components and
  movement across membranes