HISTOLOGY
EPITHELIAL TISSUE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
that it contains many blood vessels.
|
|
|
that it does not contain any blood vessels.
|
|
|
that it is made of many layers.
|
|
|
that it secretes mucous.
|
Detailed explanation-1: -Epithelial tissues do not contain blood vessels and as such are avascular. Connective tissues are usually highly vascular and so the nearby connective tissue provides essential nutrients (from the blood) to the epithelial tissue.
Detailed explanation-2: -Epithelia do not have their own blood supply (avascular), they rely on diffusion for exchange of oxygen and metabolites. Epithelia contain specialised cell-cell junctions that bind adjacent cells to each other.
Detailed explanation-3: -Given the different shapes and types of layers of epithelial cells, there can be several types of epithelial tissue, including: Simple squamous epithelium: This type of epithelium typically lines blood vessels and body cavities and regulates the passage of substances into the underlying tissue.