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Tissues. Chapter 5. Tissues . Groups of cells to perform specialized structural and functional roles. 4 major types of tissues: Epithelial Connective Muscle Nervous. Epithelial Tissue. EpT. Epithelial Tissue.

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tissues

Tissues

Chapter 5

tissues1
Tissues
  • Groups of cells to perform specialized structural and functional roles
slide3
4 major types of tissues:
    • Epithelial
    • Connective
    • Muscle
    • Nervous
epithelial tissue1
Epithelial Tissue
  • Cover all body surfaces both interior and exterior, the major tissue of most organs
slide6
This tissue has two sides, one free side, and one attached by a basement membrane.
  • Lacks blood vessels
functions
Functions
  • Secretion
  • Absorption
  • Excretion
  • Sensory reception
  • protection
types
Types

Simple squamous

Simple cuboidal

Simple columnar

Pseudostratified columnar

Stratified squamous

Transitional epithelium

1 simple squamous
1. Simple squamous
  • Single layer of thin flattened cells.
  • Cells are tightly packed
  • Nuclei are broad and thin
  • Located in areas of diffusion
2 simple cuboidal
2. Simple cuboidal
  • Single layer of cubed cells
  • Centrally located spherical nucleus
  • Located in areas of secretion
3 simple columnar
3. Simple Columnar
  • Single layer of elongated cells
  • Nuclei located in a line near the basement membrane
slide12
Located in the linings of most organs
  • Thick for protection
  • Microvilli for increased surface area
  • Goblet cells to produce mucus.
4 pseudostratified columnar
4. Pseudostratified Columnar
  • Appear layered (Are NOT!)
  • Nuclei are located at more than one level
  • Goblet cells spread throughout
slide14
Cilia to keep mucus moving
  • Located in tubes for transport (not vessels)
5 stratified squamous epithelium
5. Stratified Squamous Epithelium
  • Many layers of cells making a relatively thick tissue
  • Cells reproduce in deep layers, older cells are pushed outward to die and be sloughed off.
slide16
Located in areas of exposure
  • Contains the protein keratin in areas of outward exposure
6 transitional epithelium
6. Transitional Epithelium
  • Specialized to deal with changing tension.
  • When an organ is contracted the cells appear layered
  • Lining may stretch to 1 cell thick.
connective tissue1
Connective Tissue
  • The most abundant tissue type by weight.
  • Tissue varies in consistency from liquid semi-solid solid.
functions1
Functions
  • Provides support
  • Serves as framework
  • Fills spaces
  • Stores fat
  • Produces blood cells
slide22
6. Provides protection against infection

7. Helps repair tissue damage

cell types
Cell Types
  • Resident cells: present in stable numbers
  • Wandering cells: appear temporarily in injured tissues
  • Mast cells: large, widely distributed, release heparin and histamine.
fiber types
Fiber Types
  • Collagenous: relatively thick, flexible but not very elastic, withstands a pulling force. (tendon)
  • Elastic: not as strong but very elastic (vocal)
  • Reticular: very thin, highly branched, form delicate supporting networks.
ct types
CT types
  • Loose CT (areolar):
    • binds skin to underlying organs
    • fills spaces between muscle
    • contains numerous blood vessels
    • Layered fibers separated by a gel-like substance
slide27
2. Adipose (fat):
  • Store fats in droplets
  • Found beneath the skin, between muscles, and around organs
  • Used for protection and insulation
slide28
3. Fibrous CT:
  • Poor blood supply
  • Densely packed tissue
  • Withstand strong pulling force
slide29
4. Cartilage:
  • Rigid CT
  • Chondrocytes develop in lacunae
  • Covered in perichondrium
  • Blood supplied by perichondrium
slide30
Cartilage types:
    • Hyaline: delicate, trachea
    • Elastic: flexible, ears
    • Fibrocartilage: shock absorbing, intervertebral discs
slide31
5. Bone:
  • Most rigid CT
  • Due to mineral salts
slide32
6. Blood:
  • Most fluid
  • Function in transport and regulation
  • Components:
      • Plasma: fluid
      • RBC: carry oxygen
      • WBC: immune function
      • Platelets: cellular particles
muscle tissue1
Muscle Tissue
  • Contractile fibers
  • Skeletal
  • Smooth
  • Cardiac
nervous tissue1
Nervous Tissue
  • Highly conductive
  • Brain, spinal cord, and peripheral nerves
  • Neurons: individual nerve cells
  • Neuroglial cells: support cells, connect neurons to blood vessels
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