Download - Chapter 3 tissues intro
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Chapter 3 Tissues Chapter 3 Tissues
Quick and Dirty Quick and Dirty
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Tissues Types Tissues Types
1) Epithelial
2) Connective
3) Muscle
4) Nervous
Seems pretty simple right?
Hold that thought…
cause here we go.
Key thing to remember “FORM fits the FORM fits the FUNCTION”FUNCTION”
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Tissues: Epithelial Tissues: Epithelial
Described by SHAPESHAPE and LAYERSLAYERS
Layers Layers
Simple:Simple: A layer a single cell thick
Stratified:Stratified: Many layers thick
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Tissues: Epithelial Tissues: Epithelial Described by SHAPESHAPE and LAYERSLAYERS
Shapes Shapes “Squamous” (means Scale) = Flat and Thin
Cuboidal (sounds like “Cube” right?) = Cube shaped Columnar (Looks like a “Pillar” right?) = Rectangular in shape
“Squamous” (means Scale) = Flat and Thin“Squamous” (means Scale) = Flat and Thin
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Tissues: Epithelial Tissues: Epithelial
So what happens when you put them together?
A Good A Good DescriptionDescription
Stratified Stratified Squamous Squamous EpitheliumEpithelium
Found as: Skin or Skin or the Lining of your the Lining of your EsophagusEsophagus
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Now you try oneNow you try one
How many cell layers are there?
1 Making it SIMPLE SIMPLE
What shape are the cells? Pillar-like or Rectangular= ColumnarColumnar
Description (NAME)?Description (NAME)?
Simple Columnar Epithelium Simple Columnar Epithelium
Found in the Found in the GI Tract or GI Tract or Intestines Intestines
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Tissues: Connective Tissues: Connective Defining element: Extracellular Extracellular matrixmatrix = a secretion of structureless ground substances and fibers in-between cells Includes Includes
Bone
Cartilage
Tendons and ligaments
Adipose (Butts and breasts)
Basement Membranes (what holds your skin on to your body)
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Tissues: Connective Tissues: Connective Here we see the Matrix Matrix of
Bone Bone
Hyaline Hyaline CartilageCartilage
Found in the sternum connecting the ribs
Bone Bone
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Tissues: Connective Tissues: Connective FibersFibers also make up a good portion of Connective Tissue.
Example: Collagen Fibers Lets not forget our friend
BloodBlood (Blood Plasma =matrix) He counts too!
Lets not forget our friend BloodBlood (Blood Plasma =matrix) He counts too!
FibersFibers also make up a good portion of Connective Tissue. FibersFibers also make up a good portion of Connective Tissue.
Example: Collagen Fibers
FibersFibers also make up a good portion of Connective Tissue.
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Tissues: Muscles Tissues: Muscles
Only 33 kinds (Woo Hoo!!)
Skeletal:Skeletal: Multinucleated, long fibers, Striated & Voluntary
Smooth:Smooth: (makes up hollow organs like the stomach, intestines and blood vessels)
Single nucleated, non-striated Moves things with peristalsis (think of squeezing a tube of toothpaste) & Involuntary
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Tissues: Muscles Tissues: Muscles Cardiac Muscle:
Short and Short and BranchedBranched
Connected together by Intercalated discsIntercalated discs (they contain Gap Junctions to send messages to the next muscle cell)
*Why is this important?
Mono-nucleated
Involuntary
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Tissues: Nervous Tissues: Nervous NeuronsNeurons are the cell bodies of the Nerve cells
Conduct electrochemicalelectrochemical impulses across the body
They can have extensions that go as long as 3 ft long in some parts of the body!
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Tomorrow Tomorrow
We Lab…be readyWe Lab…be ready