BIO137 TISSUS LAB

groups of cells that perform a specialized function

Tissues

Four Major Tissue Types

Epithelial

Connective

muscle

Nervous

Epithelial Tissue

covers organs, forms the inner lining of body cavities, and lines hollow organs; has an underlying basement membrane which anchors it to connective tissue beneath and lacks blood vessels, relying on diffusion from connective tissue for nutrition

This tissue does not bleed

Epithelial Tissue

If you cut yourself and there is blood, what tissue did you cut?

connective tissue (dermis)

thin, flattened, "fried-egg" shaped cells

Squamous

cube-shaped cells

Cuboidal

column-shaped, tall elongated cells

Columnar

one layer of cells

Simple

two or more layers of cells

Stratified

appearing to have more than one layer, but each cell actually touches a basement membrane

Pseudostratified

simple squamous epithelium

Location/Function of simple squamous epithelium

Function: diffusion

Location: Alveoli of lungs/capillaries

Keratinized stratified squamous epithelium

?

Keratin

?

Dermal Papilla

Location of Keratinized stratified squamous epithelium

Location: Thick Skin (palms & soles) / Epidermis

NON-Keratinized stratified squamous epithelium

Location of NON-Keratinized stratified squamous epithelium

Mouth & Esophagus

Simple Cuboidal epithelium

Location/Function of Simple Cuboidal epithelium

Location: Ducts of Glands (exocrine)

Function: Secretion

Simple Columnar epithelium

What are the arrows pointing to?

Microvilli

What do the “A”s mark

Goblet Cells

Location/Function of Simple Columnar epithelium

Location: Digestive Tract

Function: Absorption

Pseudostratified Columnar Epithelium

Location of Pseudostratified Columnar Epithelium

Respiratory Tract

Arrow is pointing to…

Cilia

Transitional Epithelium (Non-distended)

Location/Function of Transitional Epithelium (Non-distended)

Location: Urinary Tract (Bladder/Uterus/Urethra)

Function: Changes Shape/Stretches

Loose (Areolar) Connective Tissue

Function of Loose (Areolar) Connective Tissue

Function: nature’s bubble wrap

What is "A”

Fibroblast

What is the single arrow

Elastic Fibers

What is the double arrow

Collagen Fiber

Adipose Tissue (Fat)

Function of Adipose Tissue

Protection, Insulation, Energy Storage

Dense Regular Connective Tissue

Location of Dense Regular Connective Tissue

Tendons, Ligaments, Aponeuroses

Dense Irregular Connective Tissue

Location of Dense Irregular Connective Tissue

Dermis of skin/Scar Tissue

Reticular Connective Tissue

Location of Reticular Connective Tissue

Spleen/Stroma (supporting framework) of organs

Blood

“A”

an Erthrocyte

What is the function of an Erthrocyte

Oxygen Support

“B”

Leukocyte

What is the function of an Leukocyte

Immunity

Arrow is pointing to…

Platelets

What is the function of an Platelets

Blood clotting

Hyaline (Articular) Cartilage

Location of Hyaline (Articular) Cartilage

Ends of long bones/fetal skeleton/nose/costal cartilage

Elastic Cartilage

Location of Elastic Cartilage

External Ear/Epiglottis (behind tongue)

Fibrocartilage

Locations of Fibrocartilage

Intervertebral discs (spinal area), Pubic symphysis (pelvic joint), Meniscus (knee joint)

Dense Bone Tissue

What is “A”

Central (Haversian) Canal

What is “B”

Osteon/Haversian System

What is the arrow

Osteocytes

Skeletal Muscle Tissue

This muscle is…

striated, multinucleated, and voluntary

Smooth Muscle Tissue

This muscle is…

non-striated, uninucleated, involuntary

Location of Smooth Muscle Tissue

Walls of Hollow organs

Cardiac Muscle Tissue

This muscle is…

striated, uninucleated, involuntary, branched

Arrow is pointing to…

Intercalated Disc (Gap Junction)

Nervous Tissue