Tissues

Definitions and Characteristics of each type

What are tissues?

• Group of cells that work together to perform a single function

What does an Epithelium Tissue do?

• Covers or lines the cell

Simple Squamous epithelium

• Single layer of flattened cells

Where can you find simple squamous cells?

• Lungs

Simple cuboidal epithelium

• Box/cube like

Where is simple cuboidal epithelium found?

• Tubules of the kidney

Simple columnar epithelium

• Thin layer of tall cells

• Secretion/absorption

Where is simple columnar epithelium found?

• intestine

Some cells of simple columnar epithelium may be_________

• Ciliated (cilia wave back and forth/moves things up(forward)

• EXAMPLE: Mucus

Where can ciliated simple columnar epithelium be found?

• Bronchi of the lungs (tubes that lead into the lungs)

Stratified squamous epithelium (Superficial cells appear _____)

• Several layers of cells

• Flat

• Keratanizied

Keratinized (makes waterproof) stratified squamous epithelium covers the __________

• Skin

The esophagus has moist surfaces composed of what?

• Nonkeratinized stratified squamous epithelium

Stratified cuboidal epithelium lines what?

• Follicles (fluid-filled sacs)

• Remember “James Bond Egg Cell”

Pseudostratified Epithelium

• Looks like several layers, but not

Where to find pseudostratified epithelium?

• Trachea

Transitional epithelium cause the layer of the cells to __________

• vary (in shape)

• Flat to scrunch

Where to find transitional epithelium

• Bladder

Smooth muscle is __________ & ___________

• involuntary & nostriated

Characteristics of smooth muscle (what does it surround)

• long-spindle-shaped cells

• single nuclei

• slow contractions

• Surrounds organs

Cardiac muscle is ___________ & ___________

• Involuntary & striated (faint lines)

Characteristics of cardiac muscle (where is it found?)

• branching

• uninucleate (1 per cell)

• intercalated discs

• Found in the heart

Skeletal muscle is __________ & ___________

• Voluntary (direct control) & striated (has faint lines)

Characteristics of skeletal muscle (& where to find it)

• Multinucleated

• Runs the entire length of the cell (=LONG)

• Skeleton

What do connective tissues do?

• Bind other tissues together

• Gives support

• Stores waste

• Repairs damaged tissue

3 components of ALL connective tissue

1) Few fibers

2) Several cell types

3) Abundant ground matrix

Large aggregations of fat cells are termed ___________

• Adipose tissue

Characteristics of Adipose Tissue (&where to find it)

• Highly vascular

• Lots of white blobs (“look like potato chips)

• Kidney

Every pound of _____ in your body has aprx ___ mile of ___________ vessels

• Fat, 1, blood

Dense connective tissue

• High concentration of fibers

• Holds muscles to bones

• Collagenous fibers

• Tendons & Ligaments (forms joints)

Hyaline Cartilage

• Tears easily

• Rubbery matrix

• Chondrocytes (cartilage cells) located in lacunae (“little cave”)

• Joint surfaces of bones

Where is elastic cartilage found?

• External ear

Compact bone

• Calcified matrix (HARD)

• Shafts of long bone

• Lacunae containing osteocytes (bone cells)

• Haversian canals contain blood vessels

Erythrocytes (red blood cells)

• Fluid plasma

• Formed elements

• no nuclei

• biconcave discs

• Transport oxygen

White Blood (leukocytes)

• Neutrophils

• Tri-lobed nuclei

• Bodies first line of defense

Phagocytize antigen-antibody complexes are called _________

• Eosinphils

Basophils (Histamine & Heparin)

• “Looks like headphones”

• Histamine = inflammation

• Heparin = prevents blood clots

Lymphocytes

• LARGE nuclei

• Vital role in immune response

Neurons (Nervous Tissue)

• Single axon carries impulses away

“AXON = AWAY”

• Dendrites conduct impulses toward the cell body

Be able to match all the slide pictures to the correct type of tissue

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