Biology 201 Microscopic appearances

Simple Squamous Epithelium

Location: alveoli of the lungs

Function: thin for rapid diffusion

Stratified Squamous Epithelium

Location: esophagus

Function: protection from friction

Simple Cuboidal Epithelium

Location: glands

Function: secretion/ absorption

Simple Columnar Epithelium

Location: lining of the stomach

Function: secretion/absorption

Transitional Epithelium

has all 3 layers (cuboidal, squamous, and columnar)

Location: urinary bladder

Function: stretched

Areolar Connective tissue

Location: under the skin

Function: attaches skin to underlying muscle

collagen fiber: thick lighter

elastin fiber: thin very dark

Adipose Connective tissue 
Location: under the skin

Function: Long term energy storage

adipocyte: inside white circle

Hyaline Cartilage Connective tissue

Location: costal cartilage

Function: strength and flexibility

matrix: clear space

chondrocyte in lacunae: tiny circle with dark tiny circle in it

Elastic Cartilage Connective tissue

Location: epiglottis

Function: stretch and flexibility

elastin fibers in matrix: dark color between circles

chondrocyte in lacunae: tiny circle with dark tiny circle in it

Fibrocartilage Connective Tissue

Location: menisci

Function: Allows for compression/shock absorption

collagen fibers in matrix: wavy collagen fibers

chondrocyte in lacunae: tiny circle with dark tiny circle in it

Compact Bone Connective Tissue

Location: Skeleton

Function: structural support

Blood Connective Tissue

Location: blood vessels

Function: transport nutrients

red blood cells: red dots

white blood cells: pink circle with black dots

Skeletal Muscle tissue

Location: attached to the skeleton

Function: movement of the body

Cardiac Muscle tissue

Location: heart

Function: pump blood

intercalated disc: thin dark vertical lines

Smooth muscle tissue

Location: stomach

Function: provides squeezing action

Nerve tissue

Location: brain

Function: conduct electrical impulses to the body

neuron: spider looking cell