Tissues Tissues A group of cells working together

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Tissues

Tissues

Tissues • A group of cells working together for a common function.

Tissues • A group of cells working together for a common function.

4 types 1. 2. 3. 4. Epithelial Connective Muscle nervous

4 types 1. 2. 3. 4. Epithelial Connective Muscle nervous

epithelial • Characterized by many cells with little space in between • Functions: lines

epithelial • Characterized by many cells with little space in between • Functions: lines cavities, covers organs, secretes (glands)

epithelial • Classified by shape of cell – Squamous-flat, scale-like – Cuboidal-same height and

epithelial • Classified by shape of cell – Squamous-flat, scale-like – Cuboidal-same height and width – Columnar-taller than they are wide

epithelial • Classified based on arrangement – Simple-single layer – Stratified-multilayered – Pseudostratified-appears multilayered,

epithelial • Classified based on arrangement – Simple-single layer – Stratified-multilayered – Pseudostratified-appears multilayered, but is actually simple

Connective • Characterized by fewer cells with much space in between. • Fibers are

Connective • Characterized by fewer cells with much space in between. • Fibers are typically present • Contains a non-cellular matrix which determines the characteristics of the tissue • Functions: supports, protects, cushions, stores energy, connects

Muscle • Cells shorten (contract) to cause movement • 3 types: 1. Skeletal-connects to

Muscle • Cells shorten (contract) to cause movement • 3 types: 1. Skeletal-connects to bones, striated, voluntary, multinucleated 2. Cardiac-only in the heart, striated, involuntary, branched, intercalated discs 3. Smooth-hollow internal organs, blood vessels, non-striated, involuntary, tapered at ends

nervous • Respond to stimuli and send impulses • Found in the brain, spinal

nervous • Respond to stimuli and send impulses • Found in the brain, spinal cord, and nerves • Neuraglial cells-non-conducting, support and protect neurons • Neurons-conducting cells

Stratified squamous epithelium

Stratified squamous epithelium

Simple cuboidal epithelium

Simple cuboidal epithelium

Simple columnar epithelium

Simple columnar epithelium

Pseudostratified ciliated columnar epithelium

Pseudostratified ciliated columnar epithelium

Areolar (loose) connective

Areolar (loose) connective

Adipose (connective)

Adipose (connective)

Hyaline cartilage (connective)

Hyaline cartilage (connective)

Bone (connective)

Bone (connective)

Skeletal muscle

Skeletal muscle

Multipolar neuron (nervous)

Multipolar neuron (nervous)