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Questions and Answers
What is defined as a collection of tissues sharing one or more functions?
What is defined as a collection of tissues sharing one or more functions?
A system is a collection of tissues that perform one or more functions.
A system is a collection of tissues that perform one or more functions.
False
What do several organs working together to perform particular functions compose?
What do several organs working together to perform particular functions compose?
System
An organ is a collection of ______ sharing one or more functions.
An organ is a collection of ______ sharing one or more functions.
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Match the following systems with their primary functions:
Match the following systems with their primary functions:
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What is histology primarily concerned with?
What is histology primarily concerned with?
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Tissue is defined as a collection of dissimilar cells that perform a single function.
Tissue is defined as a collection of dissimilar cells that perform a single function.
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What is the definition of tissue in histology?
What is the definition of tissue in histology?
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Histology is the study of the microscopic structure of ______, tissues, and organs.
Histology is the study of the microscopic structure of ______, tissues, and organs.
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Match the following terms with their correct definitions:
Match the following terms with their correct definitions:
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Study Notes
Introduction to Histology
- Histology is the study of cells, tissues, and organs at the microscopic level.
- A tissue is an aggregate of similar cells performing one or more functions.
- An organ is a collection of tissues sharing one or more functions.
- A system is an association of organs performing specific functions (e.g., digestive, circulatory, reproductive, immune).
Classroom Rules
- No eating or drinking in the classroom.
- No cell phones allowed during class.
- Be respectful to others.
Course Information
- Course Code: SBMZO 1101
- Course Title: Physiology and Histology
- Level: 1st level, 1st Semester
- Academic Year: 2024-2025
- Program Title: B.Sc. in Biochemistry/ Microbiology
- Contact Credit Hours/week: 3 Credit (h/w) (2 Lect./week, 1 (2) Practical/week)
- Approval Date: 9-2021
Theoretical Histology Topics
- Introduction to Histology (including types of microscopes and origin of tissues)
- Epithelial Tissues (including General characters, Simple/Stratified epithelia, Glandular epithelia)
- Connective Tissues (including General characters, Types, Connective tissue cells)
- Mid-term topics (Vascular, skeletal, muscular, and nervous tissues)
- Revision
Assessment
- Oral: 10%
- Practical Exams: 20%
- Mid-term Exam: 10%
- Activity: 20%
- Final Exams: 40%
- Total: 100%
Levels of Organization
- Cell: Basic unit of life
- Tissue: Group of similar cells
- Organ: Group of tissues working together
- Organ system: Group of organs working together
Prokaryotic vs. Eukaryotic Cells
- Prokaryotic: No membrane-bound organelles, no true nucleus, unicellular, 0.1-5 micrometers in size, asexual reproduction.
- Eukaryotic: Contains membrane-bound organelles, true nucleus, uni- or multicellular, 10-100 micrometers in size, asexual and sexual reproduction.
Types of Tissues
- Four main tissue types: epithelial, connective, muscle, and nervous.
- These tissues work together to form organs.
Origin of Tissues
- Epithelial tissue: derived from any of the three germ layers (ectoderm, mesoderm, endoderm).
- Connective tissue: derived from mesoderm.
- Muscular tissue: derived from mesoderm.
- Nervous tissue: derived from ectoderm.
Microscopy
- Microscopy is the method used to study cells and their structure.
- Resolving power: measure of the microscope's ability to separate two points.
- Light microscope resolving power: ~0.2 microns
- Electron microscope resolving power: much higher (allowing study of very small structures).
Measurement Units
- cm, mm, μm, nm, Å (Angstrom)
- Conversion factors: 1 cm = 10 mm; 1 mm = 1000 μm; 1 μm = 1000 nm; 1 nm = 10 Å
Types of Microscopes
- Light microscope: uses light
- Electron microscope: uses electrons
Light Microscope Diagram
- Parts labelled (ocular lenses, objective lenses, nose piece, stage, condenser, light source, light on/off switch, base, light volume control, arm, body tube, coarse/fine adjustment knobs)
Transmission and Scanning Electron Microscopes
- Transmission (TEM) and Scanning (SEM) electron microscopes are used for high-resolution images of biological samples.
Light vs. Electron Microscopy
- Specimen preparation method, specimen types (living vs. non-living), magnification, object thickness, medium, staining, color, image view, and importance.
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Description
This quiz covers the essential concepts of histology, focusing on the study of cells, tissues, and organs at the microscopic level. Students will explore the classification of tissues, organs, and systems, as well as classroom rules and course information related to Physiology and Histology. Prepare to test your understanding of foundational histological topics and their applications.
