Tissue Types

Epithelial Tissue

• Sheet of cells that covers the body’s surface or lines body cavities

• Protects, absorbs, secretes, and senses

Epithelial Tissue: Simple

One layer

Epithelial Tissue: Stratified

more than one layer

Epithelial Layer: Squamous Cell

• Flat and thin

• Closely packed layers, smooth surface

• allows for rapid diffusion and filtration

Epithelial Layer: Cuboidal Cell

• Cube-shaped, same height and width

• Forms layers good for secretion and absorption

• Found in kidney tubules and glads

Epithelial Layer: Columnar

• tall and narrow (column)

• specialized for absorption and secretion

• Found in the stomach and intestinal lining

Connective Tissue

• Found in all parts of the body; most abundant

• Protects, supports, binds, insulates

Connective Tissue: Proper

• Supports, connects, and protects other tissue

• Fat, ligaments, tissue surrounding organs

Connective Tissue: Bone

• Hard and strong

• Supports the body, protects organs stores minerals

Connective Tissue: Blood

• Fluid connective tissue

• transports oxygen, nutrients, and hormones and waste products

Connective Tissue: Cartalige

• Firm but flexible connective tissue

• Supports structures and cushions joints

• Nose, ears, ends of bones

Connective Tissue: Areolar

• Loose connective tissue

• Supports and cushions organs, holds tissue together, helps provide flexibility

Connective Tissue: Adipose

• Made mostly of fat-storing cells

• Stores energy, insulates the body, protects/cushions organs

Nervous Tissue

• Function: Signaling

• Sends signals through electrical conduction

• Cell populations: Neurons & Neuroglia

Muscle Tissue

• Produces most of the body movement via contraction

• Function: local motion

• Characteristics: elongated w/ lots of mitochondria/specialized ions

Muscle Tissue: Skeletal

Long cylindrical, multinuclear cells, obvious striations

Muscle Tissue: Cardiac Muscle

Branching, striated, generally uninucleate, that interdigitate at specialized junctions called intercalated discs

Muscle Tissue: Smooth Muscle

Spindle-shaped cells, no striations, cells arranged closely to form sheets