Cavity Classification Table
|
Cavity |
Embryonic Origin |
Epithelium |
Location |
|---|---|---|---|
|
Open Cavities |
Ectoderm |
True epithelium |
Skin + Sensory organs |
|
|
Endoderm |
True epithelium |
Respiratory tract + Digestive tract |
|
|
Mesoderm |
True epithelium |
Urogenital system |
|
Coelomic Cavities |
Mesoderm |
Mesothelium |
Peritoneal cavity, Pericardial cavity, Pleural cavity |
|
Closed Cavities |
Mesoderm |
Endothelium |
Atria, Ventricles, Lumen of blood and lymphatic vessels |
Classification of Lining Epithelium
|
Label |
Cell Shape |
Number of Cell Layers |
Apical Specialization |
Presence of Special Cells |
Location |
Embryonic Origin |
|---|---|---|---|---|---|---|
|
A |
Squamous |
Stratified |
Keratinized |
- |
Epidermis |
Ectoderm |
|
B |
Columnar (Prismatic) |
Simple |
Striated border |
Goblet cells |
Intestine |
Endoderm |
|
C |
[Not specified] |
Pseudostratified |
Ciliated |
Goblet cells |
Fallopian tube |
Mesoderm |
Note: For pseudostratified epithelium, cell shape is not specified.
Classification of Exocrine Glands
# | Secretory Portion Shape | Duct Shape | Location |
|---|---|---|---|
1 | Tubular | Simple | Sweat gland |
2 |
Alveolar (Saccular) |
Simple |
Sebaceous gland |
3 | Acinar | Compound | Exocrine pancreas |
4 |
Tubulo-alveolar |
Compound |
Mammary gland |
5 | Tubulo-acinar | Compound | Salivary gland |