multicellular life evolution of multicellular life animal tissue types

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Multicellular life Evolution of multicellular life Animal tissue types

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Page 1: Multicellular life Evolution of multicellular life Animal tissue types

Multicellular life

Evolution of multicellular life

Animal tissue types

Page 2: Multicellular life Evolution of multicellular life Animal tissue types

CampbellFig1.1

Page 3: Multicellular life Evolution of multicellular life Animal tissue types

CampbellFig 20.2

Page 4: Multicellular life Evolution of multicellular life Animal tissue types

Animal tissue types

• What is a tissue?

• A cooperative unit of many very similar cells that perform a specific function.

• Examples– Epithelial– Connective– Muscle– Nervous

Page 5: Multicellular life Evolution of multicellular life Animal tissue types

Epithelial tissue

• Covers and lines the body and its parts

• One surface free, the other bound to basement membrane

• Tissues are named by – Shape of cells– Number of layers of cells

Page 6: Multicellular life Evolution of multicellular life Animal tissue types

Epithelial tissue

• Simple = single layer

• Stratified = multiple layers

• Squamous = flat (tiles)

• Cuboidal = like dice

• Columnar = like bricks

CampbellFig 20.4

Page 7: Multicellular life Evolution of multicellular life Animal tissue types

Simple SquamousSimple Cuboidal

Lines the lungsIn the kidney tubules

CampbellFig 20.4

Page 8: Multicellular life Evolution of multicellular life Animal tissue types

Stratified Squamous Epithelium

Lines the esophagus

CampbellFig 20.4

Page 9: Multicellular life Evolution of multicellular life Animal tissue types

Ciliated columnar epithelium

Lines the air ways in the respiratory system

CampbellFig 20.4

Page 10: Multicellular life Evolution of multicellular life Animal tissue types

Connective tissue• Binds other tissues an provides support

matrices

• Few cells in a nonliving matrix

• Three fiber types– Collagen fibers– Elastic fibers– Reticular fibers

• Fibroblasts - cells that produce connective tissue

Page 11: Multicellular life Evolution of multicellular life Animal tissue types

Loose connective tissue(Areolar)

Holds other tissue in placeA “binding” material

CampbellFig 20.5A

Page 12: Multicellular life Evolution of multicellular life Animal tissue types

Other Connective tissues

Loose

Adipose

Blood

Fibrous connective

Cartilage

CampbellFig 20.5

Bone

Page 13: Multicellular life Evolution of multicellular life Animal tissue types

Tendons

Dense connective tissue thatAttaches muscle to bone

Like CampbellFig 30.7

Page 14: Multicellular life Evolution of multicellular life Animal tissue types

Bone Tissue

• Osteocytes• Haversian canal• Lamelle (matrix)

CampbellFig 20.5D

Page 15: Multicellular life Evolution of multicellular life Animal tissue types
Page 16: Multicellular life Evolution of multicellular life Animal tissue types

Bone Development

Page 17: Multicellular life Evolution of multicellular life Animal tissue types

Muscle tissue• Functions in movement• Bundles of long cells ( muscle fiber= muscle cell)

• Skeletal muscle– Attached to bones by tendons, produces voluntary movement– Striated unbranched

• Smooth muscle– Found in walls of digestive tract, produces involuntary movements– Unstriated, spindle shaped

• Cardiac Muscle– Striated , branched, produces heartbeat

Page 18: Multicellular life Evolution of multicellular life Animal tissue types

Muscle tissueCampbell 20.6

Smoothmuscle

Skeletalmuscle

Cardiacmuscle

Page 19: Multicellular life Evolution of multicellular life Animal tissue types

• Responsible for coordinating body activties

• Neurons are nerve cells

• Motor neurons are nerves that activate muscles

• Sensory neurons transmit information

• Composed of cell body and dendrites

• Supported by glial cells

Nervous Tissue

CampbellFig 28.3AModified

Page 20: Multicellular life Evolution of multicellular life Animal tissue types

Nervous TissueCampbellFig 28.2

Page 21: Multicellular life Evolution of multicellular life Animal tissue types

Summary