Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:The image shows a microscopic view of epithelial tissue with several cells and structures highlighted by yellow arrows. The tissue appears to be stained, likely with hematoxylin and eosin (H&E), commonly used in histology to enhance the visibility of cellular components.
### Detailed Explanation:
- **Epithelial Tissue**: This tissue forms the lining of various organs and structures in the body. Characterized by closely packed cells, it serves protective, absorptive, and secretory functions.
- **Cell Nuclei**: The darker stained, round structures within the cells are the nuclei, where genetic material is housed.
- **Cellular Arrangement**: The cells are arranged in layers, typical of epithelial tissues, which can vary from a single layer (simple epithelia) to multiple layers (stratified epithelia).
- **Arrows**: The yellow arrows point to specific features in the tissue:
- Arrow 1 indicates tightly packed epithelial cells lining a surface.
- Arrow 2 highlights the cell nuclei, which are densely stained, indicating active gene transcription.
- Arrow 3 points towards extracellular matrix components, providing structural support to the cells.
- Arrow 4 may point at a different cell type or structure within the tissue, contributing to the overall function of the epithelium.
This type of histological analysis is crucial for understanding tissue structure and function, aiding in both educational and clinical settings.
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