1 / 28

Chapter 4

Chapter 4. Tissues, glands and membranes. tissues. Histology is the study of tissues Four main groups of tissues Epithelial Connective Muscle Nervous tissue. Epithelial tissue. Forms a protective covering for the body Is the main tissue of outer layer of skin

yamka
Télécharger la présentation

Chapter 4

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. Chapter 4 Tissues, glands and membranes

  2. tissues • Histology is the study of tissues Four main groups of tissues • Epithelial • Connective • Muscle • Nervous tissue

  3. Epithelial tissue • Forms a protective covering for the body • Is the main tissue of outer layer of skin • Forms membranes, ducts, and the lining of body cavities and hollow organs

  4. Classification epithelial tissue Classification by shape • Squamous • Cuboidal • Columnar Classification by arrangement • Simple • Stratified • Pseudostratified

  5. Special functions of epithelial tissue • Traps foreign particles • Mucus-secreting (goblet) cells • Cilia • Self-repairs quickly

  6. glands • Specialized to produce a substance sent out of a body or tissue. • Exocrine glands • Single cell • Multiple cells • Endocrine glands

  7. Exocrine glands • Have tubes or ducts to secrete substances. • oil glands • Lacrimal glands • Sweat glands

  8. Endocrine glands • Not secreted through ducts, secreted directly into surrounding fluid • hormones

  9. Connective tissue Categorized by physical properties • Circulating connective tissue • Generalized connective tissue • Structural connective tissue

  10. Generalized connective tissue Two forms • Loose • Areolar tissue • Adipose tissue • Dense • Irregular • Regular • Elastic

  11. Loose ct • Areolar- surrounds organs and vessels • Adipose- stores fat

  12. Dense CT Types of dense connective tissue • Irregular; mostly collagenous fibers in random arrangement. Examples: membranes, capsules • Regular; mostly collagenous fibers in parallel alignment. Examples: tendons, ligaments • Elastic; elastic fibers. Examples: vocal cords, blood vessel walls

  13. Structural CT • Cartilage • Hyaline cartilage • Fibrocartilage • Elastic cartilage • Bone • Osseous tissue • Bone marrow

  14. Structural ct

  15. Muscle tissue Types of muscle tissue Smooth- - involuntary muscle - non striated -lines hollow organs (small intestine etc) • Skeletal muscle • Voluntary muscle • Striated muscle • Cardiac muscle (myocardium) • Involuntary muscle • Intercalated disks • Smooth muscle (visceral muscle)

  16. Muscle tissue

  17. Nervous tissue Body’s communication system is made of nervous tissue • Brain • Nerves • Spinal cord

  18. Nervous tissue

  19. neuron Basic unit of nervous tissue • Nerve cell body • Fibers • Dendrite • Axon • Nerve

  20. neuroglia • Protect neurons • Form myelin sheath around neurons to speed up impulses

  21. membranes Thin sheets of tissue • Cover a surface • Serve as a divider • Line a hollow organ or body cavity • Anchor an organ • Contain cells that secrete lubricants

  22. Epithelial membranes Several types • Serous • Mucous • Cutaneous

  23. Serous membranes Three types of serous membranes • Pleurae • Serous pericardium • Peritoneum Organization of the serous membrane • Parietal layer • Visceral layer

  24. Mucous membranes Vary in structure and function • Trap and remove foreign particles • Protect deeper tissue • Absorb food materials

  25. Connective tissue membranes Connective tissue without epithelium • Synovial membranes • Meninges Fibrous bands or sheets that support and hold organs • Superficial (subcutaneous) fascia • Deep fascia Membranes that support organs • Fibrous pericardium • Periosteum • Perichondrium

  26. Tissues and aging Tissues lose elasticity as they age • Skin • Blood vessels • Tendons and ligaments • Bones • Muscles

More Related