1 / 20

Histology

Histology. What is Histology?. Histology is the study the structure and function of normal mammalian cells and tissues using various types of microscopes. What is …..? . A cell? Luckily, most of you can answer this Functional unit of all living organisms A tissue?

issac
Download Presentation

Histology

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Histology

  2. What is Histology? • Histology is the study the structure and function of normal mammalian cells and tissues using various types of microscopes.

  3. What is …..? A cell? • Luckily, most of you can answer this • Functional unit of all living organisms • A tissue? • A group of cells and surrounding material • Includes fibers, liquid or gelatinous material • Provides support

  4. How can we see tissues? • Tissues make up all the organs in the body, including skin, but to see the details of the cells and fibers we need to do a few things.

  5. Making a microscope slide • Cut a sample from an organism • Fix it with special chemicals • Permeate it with wax • Slice the wax into thin sections • Stain the sample with colorful stains • Place on the microscope and view

  6. Epithelia • Covers and lines cavities of the body • Thin cells are good for gas and nutrient exchange • Thicker cells are good at absorbing and secreting

  7. Epithelia, continued • All cells connect together to form a sheet if they are a covering or lining epithelia • All glands that secrete hormones and other major proteins for the body are also made of epithelia

  8. Connective Tissue • 3 elements • Cells • Fibers • Ground substance • In varying proportions • Most diverse tissue type

  9. Where it all begins • Mesenchyme • From the mesoderm • Found in the umbilical cord after delivery • Source of connective tissue stem cells.

  10. Connective Tissue includes: • Blood • The dermis • Cartilage • Tendons • Bone • Space fillers in organs • Fat

  11. Muscle • Three types

  12. Overview of Muscle Cell Types

  13. Neuromuscular Junction • Where axons of neurons meet skeletal muscle • This connection is blocked by BOTOX

  14. Nervous Tissue • Spinal cord • Brain • Peripheral Nervous Tissue

  15. Cells of the nervous sytem • Neurons

  16. Neurons have various appearances

  17. Support cells of the nervous sytem • Glial cells • in the spinal cord and brain • Primarily in the white matter • Schwann cells • Elsewhere in the body • Myelination • A special form of insulation

  18. Poliomyelitis • Virus • Attacks anterior horn cells of spinal cord • lower motor neurons • Paralysis of associated skeletal muscle • Microglia • engulf virus • destroyed cells, • dark staining areas

More Related