Simple Epithelium - Done

Features of Simple Squamous

Most delicate epithelium

Function of simple squamous

Filtration (kidneys), diffusion (lungs), secretion where slippery surface needed

2 subtypes of simple squamous

Mesothelium and Endothelium

Function of Mesothelium

Lines pericardial, pleural and peritoneal cavities

Function of Endothelium

Lines inside of heart and blood and lymphatic vessels

serosa

a serous membrane made of mesothelium and connective tissue

Function of Simple Cuboidal

Secretion and Absorption

Location of simple cuboidal

Pancreas ducts

Features of Simple Columnar

More cytoplasm so more organelles and more metabolically active then squamous

2 subtypes of simple columnar

non-ciliated and ciliated

Components of simple columnar

microvilli or cilia

Features of non-ciliated simple columnar

Microvilli on apical surface, have goblet cells interspersed

What is a Goblet cell

modified columnar cell

microvilli

non-motile cytoplasmic projections (brush boarder)

Function of microvilli

increased surfaced area for absorption

Location of non-ciliated simple columnar

Lines gut mucosa from stomach to anus, ducts of many glands, gallbladder

Function of non-ciliated simple columnar

secretion, lubrication, absorption

Features of ciliated simple columnar

single layer, goblet cells

cilia ability

movement (respiratory elevator)

Location of ciliated simple columnar

some bronchioles, uterine fallopian tubes, sinuses, central canal of spinal cord, ventricles of brain