body tissues Flashcards
What is the structural arrangement of the epithelial tissue?
Made of tightly packed cells arranged in layers.
Example sentence: The skin is composed of epithelial tissue.
Which surface of epithelial tissue is exposed, and to what?
The upper surface is exposed to the environment or an internal body space.
Example sentence: The apical surface of the epithelial tissue is exposed to the external environment.
What is the amount of extracellular material found in epithelial tissue?
Small amount of extracellular material
Example sentence: Epithelial tissues have minimal extracellular matrix compared to connective tissues.
Why is epithelial tissue described as avascular, and where does it receive nutrients for the tissue?
It doesn’t have blood vessels and relies on underlying connective tissue for nutrients
Example sentence: The avascular nature of epithelial tissue necessitates its reliance on underlying connective tissue for nourishment.
Why does the cell near the connective tissue divide rapidly for regeneration?
Due to the high rate of mitosis.
Example sentence: The rapid division of cells near the connective tissue allows for quick regeneration of epithelial tissue.
Where does the epithelial tissue rest?
Basement membrane
Example sentence: The epithelial tissue rests on the basement membrane.
What is the basement membrane?
The layer between an epithelium and underlying connective tissue
Example sentence: The basement membrane separates the epithelial cells from the underlying connective tissue.
What is the function of the basement membrane?
Connects and secures the epithelium to connective tissue and provides structural support.
Example sentence: The basement membrane plays a crucial role in anchoring the epithelium to the connective tissue.
What is the basal membrane made of?
Collagen, glycoproteins, and protein-carbohydrate complexes.
Example sentence: The basal membrane consists of various proteins and complexes for structural integrity.
What are the three types of surfaces in the epithelial cells?
Basal, apical, and lateral
Example sentence: Epithelial cells have distinct basal, apical, and lateral surfaces.
What is the basal surface of epithelial tissue, and what does it face?
The basal surface faces the basement membrane (bottom).
Example sentence: The basal surface of epithelial tissue is in contact with the basement membrane.
What is the apical surface of epithelial tissue, and where does if faces and where is it located?
The apical surface faces away from the basement membrane and is exposed to the external environment or internal space (top).
Example sentence: The apical surface of epithelial tissue is oriented towards the external environment.
Where is the lateral surface of epithelial tissue, and what is its function?
The lateral surface is located between the basal and apical surfaces, functioning as the ‘sidewall’ between cells
Example sentence: The lateral surface of epithelial tissue provides structural support and cell communication.
What are the two classification of layers in the epithelial tissue?
Simple and Stratified
Example sentence: Epithelial tissue can be classified as simple or stratified based on the number of cell layers.
How is simple epithelia described?
Each cell is anchored directly to the basement membrane
Example sentence: Simple epithelia consist of a single layer of cells attached to the basement membrane.
