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FOUR TYPES OF ANIMAL FOUR TYPES OF ANIMAL TISSUESTISSUES
EPITHELIAL TISSUEEPITHELIAL TISSUE(COVERING)(COVERING)
Tightly-joined closely-packed cells One side of exposed to air or
internal fluid, other side attached to a basement membrane
Covers outside of the body and lines internal organs and cavities
Barrier against mechanical injury, invasive microorganisms, and fluid loss
Provides surface for absorption, excretion and transport of molecules
TYPES OF TYPES OF EPITHELIAL EPITHELIAL TISSUETISSUE
Cell shape Squamous Cuboidal Columnar
Number of cell layers Simple Pseudostratified Stratified
RELATE STRUCTURE TO FUNCTION!
CONNECTIVE TISSUE(FRAMEWORK)
Binding and support of other tissues
Large amount of extracellular matrix with fewer cells
ECM - network of fibers in liquid, jelly-like or solid matrix
MUSCLE TISSUEMUSCLE TISSUE(MOVEMENT)(MOVEMENT)
Composed of long cells called muscle fibers
Contraction movement
NERVOUS TISSUENERVOUS TISSUE(CONTROL)(CONTROL)Senses
stimuli and transmits nerve impulses
Single cell body with long extensions (axons and dendrites)
Axon
Dendrite
Cell body
Tissue Type Epithelial Connective Muscle Nerve
Cell Shape Flattened, cuboidal, columnar
Irregular or round Elongated Cell appendages branched
Cell Arrangement
Single multilayered
Scattered in matrix
In sheets or bundles
Isolated or networked
Location Body covering or lining organs or
cavities
Supports other organs
Lining internal organs, make
skeletal muscles
Concentrated in brain and spinal cord + all over
the body
Surface Feature of Cells
Cilia, microvilli - - -
Matrix Type Basement membrane
Varied – protein fibers + liquid, gelatinous, firm
to calcified
- -
Matrix Amount Minimal Extensive Absent Absent
Unique Feature No direct blood supply, except for
glands
Cartilage has no blood supply
Can generate electrical signals,
force and movement
Can generate electrical signal