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Tissue Classification Lab Guide
- 1. Lab 3: Tissue Classification, Skin and Body Membranes Human Anatomy & Physiology Lanier Technical College BIOL 2113 Lab
- 2. General Characteristics of Epithelial Tissues • Cellularity – densely packed – little extracellular matrix • Forms Layers – has Polarity – Supported by underlying Connective Tissue • apical surface • basal surface • Innervated but avascular (no direct blood supply) • Derived from embryonic ectoderm and endoderm
- 3. Classification of Epithelial Tissues by the Number of Layers
- 4. Classification of Epithelial Tissues by the Shape of Cells
- 9. Simple Cuboidal and Simple Columnar Epithelium
- 10. Stratified Epithelial Tissues • Are assigned their cell shape designation by the shape of the cells in the apical layer
- 12. Stratified Squamous Epithelium keratinized versus non-keratinized
- 15. Transitional Epithelium - Bladder relaxed versus stretched
- 18. General Characteristics of Connective Tissues • Cellularity – fewer cells, rarely touching, surrounded by considerable extracellular matrix • ground substance (gelatinous glycoproteins) • structural fibers (fibrous proteins, e.g., collagen, elastin, reticulin) • Does not form layers – supports and fills in between epithelial tissues • Innervated and Vascular (direct blood supply) • Cartilage is the exception with no capillary beds • Derived from embryological mesoderm
- 19. Embryonic Germ Layers and the Primary Tissue Types They Produce
- 20. Major Classes of Connective Tissue
- 25. Adipose Tissue
- 28. Regular Dense Fibrous Connective Tissue
- 30. Irregular Dense Fibrous Connective Tissue
- 35. Fibrocartilage
- 36. Fibrocartilage
- 39. Types of Bone Compact: appears very dense most of the bone mass in the body Spongy: appears poorly organized tiny bone struts = trabeculae
- 41. Blood Cells
- 42. Muscle Tissues • Characteristics of muscle tissues • High degree of cellularity • Cells contain contractile proteins • Well vascularized • A highly specialized type of connective tissue
- 45. Classification of Muscle Tissues • two types are striated: • Skeletal muscle • attached to bones • multinucleate • voluntary • fibers are parallel and cylindrical • Cardiac muscle • most of the heart wall • single nucleus • involuntary • branched cylinders connected by intercalated discs
- 47. Classification of Muscle Tissues • one type is non-striated • Smooth muscle. • walls of hollow organs: blood vessels, digestive tract, airways, bladder • involuntary • single nucleus • spindle shaped
- 48. Nervous Tissue
- 49. Nervous Tissue • Highly specialized epithelial cells • Convert stimuli into electro-chemical signals for transfer of information • Structure • cell body (soma) and extensions • dendrites (highly branched) – carry incoming signal • axon (long, usually single strand) – carry outgoing signal
- 50. Take Advantage of Available Histology Resources http://www.meddean.luc.edu/lumen/MedEd/Histo/frames/h_fram13.html http://www.med.uiuc.edu/histo/small/atlas/slides.htm http://www.pathguy.com/histo/000.htm
- 51. End Lab 4 Presentation