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Questions and Answers
Where can epithelial tissue be found?
Where can epithelial tissue be found?
- Limited to the organs of the body
- Only in the blood vessels of the body
- Exclusively in the nervous system
- Covering the external body surfaces and internal cavities (correct)
What is a tissue?
What is a tissue?
- A single type of cell in the body
- A group of organs working together in an organism
- A single cell performing multiple functions
- A group of cells working together to carry out one or several functions (correct)
What are the two types of epithelial tissue?
What are the two types of epithelial tissue?
- Simple and compound
- Simple and stratified (correct)
- Complex and stratified
- Single and compound
What is the function of epithelial cells?
What is the function of epithelial cells?
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What is the characteristic of epithelial tissue cells?
What is the characteristic of epithelial tissue cells?
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Study Notes
Epithelial Tissue
- Epithelial tissue is found lining body surfaces, organs, and cavities, such as the skin, respiratory tract, digestive tract, and blood vessels.
- It encompasses glial cells, which support nerve tissue, and forms glands that secrete substances.
Definition of Tissue
- A tissue is a group of similar cells that perform a specific function within an organism, working together to carry out complex tasks.
Types of Epithelial Tissue
- Two main types of epithelial tissue:
- Simple Epithelium: A single layer of cells; involved in absorption, secretion, and filtration.
- Stratified Epithelium: Multiple layers of cells; provides protection in areas subjected to abrasion and wear.
Function of Epithelial Cells
- Epithelial cells serve several vital functions, including:
- Providing a protective barrier against environmental damage.
- Facilitating absorption and secretion in various organs (e.g., intestines, glands).
- Playing roles in sensation and transportation of substances.
Characteristics of Epithelial Tissue Cells
- Epithelial cells are characterized by:
- Closely packed structure with minimal extracellular space.
- Polarity, with distinct apical (top) and basal (bottom) surfaces.
- High regenerative capacity, enabling rapid healing and replacement.
- Avascularity, meaning they lack blood vessels and obtain nutrients via diffusion from underlying tissues.
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