A. EPITHELIAL TISSUE
This tissue consists of closely aggregated cells which can be found from the lining of the body cavities, ducts of glands, and skin. They are grouped according to shape of the cell, location, and function.
- Simple squamous. This tissue consists of thin, flat-like cells. It is located in the inner cheek lining of the buccal cavity. This tissue is specialized for protection.
- Simple columnar. This tissue consists of tall and rectangular cells. It is common in the lining of the stomach and intestine. It is specialized for absorption.
- Simple cuboidal. This tissue consists of cube-like cells usually found in the lining of the kidney tubules. It is specialized for secretion.
- Stratified squamous. This tissue consists of many layers of flattened cells usually found in the epidermis of the skin. It is responsible for protection.
- Glandular epithelium. This epithelial tissue is lined along the body of the glands and ducts of cutaneous glands.
OBSERVATIONS: - Draw and label the visible parts of the different types of epithelial tissues. Indicate the location and function below your drawing.
Simple Squamous
Stratified Squamous
The Correct Answer and Explanation is :
Explanation of Epithelial Tissues:
Epithelial tissue is a group of cells closely packed together, forming protective layers or glands in the body. These tissues are classified based on their shape, the number of layers, and their function.
1. Simple Squamous Epithelium:
- Structure: This type consists of a single layer of flat, thin cells.
- Location: It is found in areas where diffusion and filtration occur. For example, the inner lining of blood vessels (endothelium), air sacs of the lungs (alveoli), and the inner surface of the heart and lymphatic vessels.
- Function: Simple squamous epithelium is specialized for processes like diffusion, osmosis, and filtration due to its thin structure, which allows substances to pass through easily.
2. Stratified Squamous Epithelium:
- Structure: This tissue consists of multiple layers of flattened cells.
- Location: It is found in areas subjected to mechanical stress and abrasion, such as the skin (epidermis), the lining of the mouth, esophagus, and vagina.
- Function: Stratified squamous epithelium is specialized for protection, particularly against physical damage, pathogens, and dehydration. The outermost layers are keratinized in areas like the skin, which helps in providing waterproofing and additional protection.
Visual Representation:
Below is the diagram illustrating the structure and location of Simple Squamous and Stratified Squamous epithelial tissues.
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Here is the illustration showing the structure and location of Simple Squamous and Stratified Squamous epithelial tissues. It also includes labels to highlight the relevant details.
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