MindMap Gallery epithelial tissue
A mind map of epithelial tissue. Its structural characteristics are more cells, less extracellular matrix, polarity, and rich sensory nerves. It introduces the knowledge that covering epithelium is divided into single-layer epithelium and stratified epithelium.
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epithelial tissue
Structural features
Many cells
Less extracellular matrix
There is polarity
Rich in sensory nerves
Covering epithelium
single layer epithelium
single layer squamous epithelium
a layer of flat cells
surface
Irregular or polygonal
smooth
Surrounding
jagged
Neighboring cells fit into each other
cell nucleus
single
round or oval
Located in the center of the cell
side view
Cells are elongated and flat
Cytoplasm is less and thin (the part containing the nucleus is slightly thicker)
endothelium
Distributed in the heart, blood vessels, and lymphatic cavities
Mesothelium
Distributed on the surface of pleura, peritoneum and pericardium
single layer cuboidal epithelium
A layer of approximately cubic cells
surface
Hexagon or polygon
side view
Cells are cuboidal
cell nucleus
Single round shape
Located in the center of the cell
distributed
Renal tubules, thyroid gland, some exocrine gland ducts
Function
secretion and absorption
simple columnar epithelium
a layer of prismatic cells
surface
Hexagonal or polygonal
side view
Cells are columnar
cell nucleus
Single oval
Often located in the lower 1/3 of the cell
distributed
The cavity surface of the stomach, small intestine, large intestine, gallbladder, fallopian tube, uterus, etc.
Function
absorption and secretion
Goblet cells sandwiched between single-layer columnar epithelium distributed in the intestine
Shaped like a goblet
The cell nucleus is triangular in shape
located at the base of the cell
The top cytoplasm is often filled with mucin granules of varying sizes.
pseudostratified ciliated columnar epithelium
A layer of cells of different shapes, heights, and sizes
columnar cells
Free surface has ciliated structure
ciliated cells
goblet cells
Often located between columnar cells
spindle cells
cone cells
side view
Various types of cells vary in height
cell nucleus
The location is not on the same level
The basal surface is attached to the basement membrane
stratified epithelium
Stratified squamous epithelium
stratified squamous epithelium
Composed of multiple layers of cells with different shapes
From deep to shallow
basal layer
Cube or dwarf columnar
Has strong ability to divide and proliferate
middle layer
Several layers of polygonal cells or spindle-shaped cells
Larger cell size
The nucleus is round and located in the center
surface layer
Composed of several layers of flat cells
keratinized stratified flat cells
body surface
nonkeratinizing stratified flat cells
Oral cavity, pharynx, esophagus, nasal vestibule, vagina
Stratified cuboidal epithelium
surface layer
cuboidal cells
deep
Several layers of polygonal cells
Stratified columnar epithelium
surface layer
columnar cells
metastatic epithelium
theme