Tissues part 1

Types of epithelial, connective, muscle, and nervous tissue. With their description, function, and location.

Simple Squamous (Epithelial)

- 1 layer of thin flat cells

- allows diffusion of molecules (movement)

-found in lungs or kidneys

Simple Cuboidal (Epithelial)

-1 layer of round cells

- secretes and absorbs

-found in ducts or kidneys

Simple Columnar (Epithelial)

-1 layer of rectangular cells

-absorbs and secretes

-found in the stomach and small/large intestines

Pseudo-stratified Columnar (PCC)(Epithelial)

-has cilia and looks rectangular but isn’t

-acts as a filter

-found in nasal, larynx, trachea

Stratified Squamous (Epithelial)

-many layers of flat cells

-protection

-found in different organs, skin, pharynx, and esophagus

Transitional (Epithelial)

-2 to 5 cells thick, Cuboidal surface

- used for organs to stretch

-found ureters

Areolar (Connective Loose)

-loose but can see thick (collagen) and thin (elastic) fibers

-is tough and has elasticity

-found in the dermis and wrapping organs

Adipose (Connective Loose)

-fat cells

-used to insulate and an energy reserve

-found under the skin

Reticular (Connective Loose)

-looks like cherry blossoms, short and black

-forms stroma and provides structural support

-found in the stroma, spleen, lymph nodes and bone marrow

Dense Regular (Dense)

-parallel, organized, few nuclei

-it helps connect organs

-found in tendons

Dense irregular (Dense)

-collagen in many directions and few nuclei

-is for strength

-found in the dermis

Hyaline (Cartilage)

-most abundant

-often paired chondrocytes, purple, amorphous

-is tough stuff and slick

-found in the shoulder joint trachea

Elastic (Cartilage)

-black in color

-chondrocytes with lots of black in it

-is for flexibility

-found in external ear….

Fibrocartilage (Cartilage)

-is teal and has some collagen in it

-acts as the bodies shock absorber

-found in the knees and between vertebrae

Bone (Other)

-looks like growth rings on a tree, made of osteocytes (brown and tan)

-it protects the structure and is a mineral reserve

-found in the skeleton

Blood (Other)

-Biconcave center (red with a thin center, RBC WBC)

-used to transport oxygen

-found in cardiovascular

Skeletal (Muscle)

-striated

-long cylindrical cells that are multi nucleic

-is used for movement
-found in bones

Cardiac (Muscle)

-striated, branched intercalated discs (gap)

-used for pumping for the heart

-found in the heart

Visceral/Smooth (Muscle)

-has no striations

-used for one-way movement (peristalsis)

-found in hollow organs

Nervous

-large neurons with tiny neuroglia

-used to respond to stimuli

-found in the brain and spinal cord