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Histology Slides

Histology Slides. Biology 131 – Anatomy and Physiology Instructor: Ruth Williams. Epithelial Tissues. No intercellular matrix. Avascular Contains nerve endings Lie on a basement membrane. Able to undergo mitosis. Develop from all three fetal tissues.

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Histology Slides

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  1. Histology Slides Biology 131 – Anatomy and Physiology Instructor: Ruth Williams

  2. Epithelial Tissues • No intercellular matrix. • Avascular • Contains nerve endings • Lie on a basement membrane. • Able to undergo mitosis. • Develop from all three fetal tissues. • One surface of cells is exposed to a space or cavity.

  3. Epithelial Tissues • Simple Squamous Epithelium • Single layer of cells. • Cells are longer than they are wide. • Nuclei tend to bulge into a space. • Fxns

  4. Epithelial Tissues • Simple cuboidal epithelium • Single layer of cells • Width of cell is roughly equal to height of cell. • Fxns

  5. Epithelial Tissues • Simple Columnar Epithelium • Single layer of cells • Height of cells is greater than cell width. • Fxns

  6. Epithelial Tissues • Pseudostratified ciliated columnar • Actually a simple epithelium – every cell touches the basement membrane. • Contains goblet cells.

  7. Epithelial Tissues • Transitional Epithelium • Located in urinary bladder and ureters only. • Transitions from stratified cuboidal to stratified squamous

  8. Epithelial Tissues • Stratified Squamous • When you are looking at a stratified epithelium, to identify the shape of the cells always look at the top most layer. • Stratified Squamous Epithelium is either keratinized or non-keratinized

  9. Epithelial Tissues • Stratified Cuboidal • Located primarily in ducts of glands

  10. Muscle Tissue • Smooth Muscle • Myocytes lack visible striations. • Smooth muscle is located in visceral organs. • Smooth muscle is involuntary muscle.

  11. Muscle Tissue • Skeletal Muscle • Myocytes are multinucleated. • Myocytes run entire length of muscle. • Myocytes are striated. • Skeletal muscle is voluntary muscle.

  12. Muscle Tissue • Cardiac Muscle • Myocardial cells are short and branched. • Myocardial cells are striated. • Myocardial cells are joined by intercalated disks (note arrow in picture). • Cardiac muscle is involuntary muscle.

  13. Nerve Tissue • Neuron • Contains cell body, axon and dendrites. • In this slide you can see the cell body of a neuron and the area of an axon, called the axon hillock, where the axon attaches to the cell body (note arrow).

  14. Connective Tissue • Blood • Fluid connective tissue. • Contains leukocytes and erythrocytes • Green arrows point to neutrophils. • Blue arrow points to a monocyte. • Platelets and erythrocytes are also visible.

  15. Connective Tissue • Hyaline Cartilage • Most abundant cartilage. • Located in most joints. • Precursor to most long bones of body. • Note how cells of hyaline cartilage ‘bunch up’. • Note how chondrocytes ‘shrink’ away from their lacunae (pockets within semisolid intercellular matrix of cartilage) – characteristic of cartilage.

  16. Connective Tissue • Elastic Cartilage • In order to see elastic proteins in elastic cartilage a special stain is used. • Elastic fibers will stain gray to black in color.

  17. Connective Tissue • Fibrocartilage • Primarily located in intervertebral disks and pubic symphysis. • Note how chondrocytes tend to line up. • Compared to a herring bone pattern.

  18. Connective Tissue • Bone • This is a slide of ground/polished bone. • Cells of bone are called osteocytes.

  19. Connective Tissue • Bone

  20. Connective Tissue • Connective Tissue Proper • Loose areolar connective tissue. • Found in most tissues of the body.

  21. Connective Tissue • Connective Tissue Proper • Dense Regular Connective Tissue • Collagen fibers run parallel to one another. • Note cells of dense regular c.t., called fibrocytes, are located between collagen fibers.

  22. Connective Tissue • Connective Tissue Proper • Dense Irregular connective tissue.

  23. Connective Tissue • Connective Tissue Proper • Elastic connective tissue

  24. Connective Tissue • Connective Tissue Proper • Reticular connective tissue

  25. ConnectiveTissue • Connective Tissue Proper • Adipose connective tissue. • Brown adipose tissue is found in newborns and hibernating animals.

  26. References • Integumentary System • www.udel.edu/Biology/wags/histopage/colorpage/cin/cin.htm • The JayDoc HistoWeb, University of Kansas Medical Center, 1996 • www.kumc.edu/instruction/medicine/anaotmy/histoweb/index.htm • Compact Bone Histology • www.cellbio/utmb.edu/microanatomy/bone/compact_bone_histology.htm • General Histology Images, USC School of Dentistry • www.usc.edu/hsc/dental/ghisto

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