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Histology
Basic Histology
| Term | Description |
|---|---|
| Epithelium | Tightly packed cells functioning as covering and lining tissues. Always found as a surface tissue |
| Connective tissue | Few cells with lots of extracellular material; many functions. |
| Muscle | Elongated cells specilized to shorten(contract) |
| Nervous tissue | Wirelike cells specialized for conduction of electrical signals. Brain, spial cord, and nerves. |
| Cell shape - SQUAMOUS | Flat |
| Cell shape - CUBOIDAL | Cube |
| Cell shape - COLUMNAR | Column |
| Simple | One layer |
| Stratified | Multiple layers |
| Functions of epithelial tissues | Secretion, absorption, excretion, protection. |
| Simple squamous epithelium | Single layer of flat cells. Forms the lining of cardiovascular system. It is the tissue always in contact with blood as it moves through the body. |
| Simple cuboidal epithelium | Single layer of cubed cells. Lining of many glands of the body. Sometimes called glandular epithelium. |
| Simple columnar epithelium | Single layer of tall columnar cells. Inner lining of digestive tract. Cilia covered surface lining the brochi of the lungs and the uterine tubes. |
| Four basic types of connective tissue | Connective tissue proper(soft) - Cartilage(rubbery) - Bone(hard) - Blood(fluid) |
| 2 types of connective tissue proper | Fixed and Wandering |
| Types of fixed cells | Fibrocytes and Adipose |
| Fibrocytes are... | The main cell of connective tissue. Cells that produce extracellular fibers. |
| Adipose cells are... | Cells specialized to store lipid energy reserves(FAT) |
| Wandering cells are... | Body defense and repair cells of the white blood cell lineage. |
| Interfibrillar substance | Water with various suspended molecules between the fibers. |
| Collagen fibers | Very strong in tension, not strong in compression. |
| Elastic fibers | String-like or sheet-like branched proteins, stretchy |
| 5 types of connective tissue proper | Loose collagenous connective tissue - Dense irregular collagenous connective tissue - Dense regular collagenous connective tissue - Elastic tissue - Adipose tissue(fat) |
| Cartilage | Lack internal blood supply. Resists compression, not strong with tension. |
| 3 types of cartilage | Hyaline - Fibrocartilage - Elastic |
| Which cartilage is the most common in the body? | Hyaline |
Created by:
saypleaseamy
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