Tissues

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Tissues

  1. 1. Tissues <ul><li>Tissue is a group of cells that perform a common or related function </li></ul><ul><li>They are similar in structure </li></ul>Epithelia Tissue Connective Tissue Muscle Tissue Nervous Tissue
  2. 2. Epithelial Tissue <ul><li>Epithelia tissue is a sheet of cells that cover a body surface or cavity </li></ul>Tissues Simple Epithelia Stratified Epithelia
  3. 3. Simple Epithelia <ul><li>Composed of only a single cell. </li></ul><ul><li>Function in absorbtion and filtration </li></ul>Epithelia Simple Squamous Simple Cuboidal Simple Columnar
  4. 4. Simple Squamous <ul><li>Flat cells with sparse cytoplasm </li></ul><ul><li>Found where rapid filtration is needed </li></ul><ul><li>Two types-Mesothelia and Endothelia </li></ul>Simple Epithelia Simple Cuboidal Simple Columnar
  5. 5. Simple Cuboidal <ul><li>Simple Cuboidal cells are formed of a single layer of cells </li></ul><ul><li>Form the walls of the glands and the kidney tubules </li></ul>Simple Epithelia Simple Squamous Simple Columnar
  6. 6. Simple Columnar <ul><li>Mostly associated with absorbtion and secretion </li></ul><ul><li>Line the digestive tract </li></ul><ul><li>Contain microvilli and goblet cells, furthering the it’s purpose </li></ul>Simple Epithelia Simple Squamous Simple Cuboidal
  7. 7. Pseudostratified Columnar <ul><li>All of the Pseudostratified Columnar cells rest on a basement membrane, but rest at various heights </li></ul><ul><li>Function in absorbtion and secretion </li></ul>Epithelial Tissue
  8. 8. Stratified Epithelia <ul><li>Contain two or more cells layers </li></ul><ul><li>The major function of these cells is to protect </li></ul>Epithelial Tissue Stratified Squamous Stratified Cuboidal Stratified Columnar
  9. 9. Stratified Squamous <ul><li>Composed of several cell layers </li></ul><ul><li>Main purpose is protection </li></ul><ul><li>Contain keratin, a protective protein </li></ul><ul><li>Forms the external part of the skin </li></ul>Stratified Epithelia Stratified Cuboidal Stratified Columnar
  10. 10. Stratified Cuboidal <ul><li>Quite rare </li></ul><ul><li>Found in the ducts of larger glands </li></ul>Stratified Epithelia Stratified Columnar Stratified Squamous
  11. 11. Stratified Columnar <ul><li>Found in the pharnyx, male urethra, and the lining of glandular ducts. </li></ul>Stratified Epithelia Stratified Cuboidal Stratified Squamous
  12. 12. Transitional Epithelia <ul><li>Lines the hollow urinary organs </li></ul><ul><li>Basal layer is made up of columnar or cuboidal cells </li></ul><ul><li>Stretch out when urine is going through the tubes </li></ul><ul><li>Top cells are squamous like </li></ul>Epithelial Tissue
  13. 13. Muscle Tissue <ul><li>Highly cellular tissue </li></ul><ul><li>Responsible for most types of body movement </li></ul><ul><li>Possesses myofilaments </li></ul><ul><li>Three categories-Skeletal, Muscular, and Smooth </li></ul>Tissues Skeletal Muscle Cardiac Muscle Smooth Muscle
  14. 14. Skeletal Muscle Tissue <ul><li>Packed tightly by connective tissue sheets </li></ul><ul><li>Attached to skeletal bones </li></ul><ul><li>Form the flesh of the body </li></ul><ul><li>Muscle cells contain muscle fibers </li></ul>Muscle Tissue Smooth Muscle Cardiac Muscle
  15. 15. Cardiac Muscle <ul><li>Found only in the wall of the heart </li></ul><ul><li>Contracts and propels blood through the blood vessels </li></ul><ul><li>Uninucleate and have branching cells that fit together at intercalated discs </li></ul>Smooth Muscle Skeletal Muscle Muscle Tissue
  16. 16. Smooth Muscle <ul><li>Has no striations </li></ul><ul><li>Found mainly in the walls of hollow organs </li></ul><ul><li>Main purpose is to squeeze substances through the muscles </li></ul>Cardiac Muscle Skeletal Muscle Muscle Tissue
  17. 17. Nervous Tissue <ul><li>Nervous Tissue is the main component of the nervous system </li></ul><ul><li>Contains neurons </li></ul><ul><li>Contain supporting cells </li></ul>Tissues
  18. 18. Connective Tissue <ul><li>Primary function is to support, protect, and bind together. </li></ul>Tissues Bone Tissue Blood Tissue Connective Tissue Proper Cartilage
  19. 19. Blood Tissue Blood does not connect anything or give support, but develops from a mesenchyme , consists of cells, and contains a matrix Contains either red or white blood cells Fibers are made of a soluble protein molecules that form clots Functions include being the transport vehicle for the cardiovascular system, carrying nutrients, wastes, and respitory gases, and other substances throughout the body. Connective Tissue
  20. 20. Bone Tissue Bone tissues support and protect body structures Bone matrix is similar to cartilage matrix, but is harder and more rigid Contains osteoblasts, which produce the organic part of the matrix Contains osteons which are formed by rings of bony matrix Connective Tissue
  21. 21. Cartilage Tissue Cartilage can withstand both tension and compression Tough and flexible Lacks nerve fibers, and recieves nutrients via diffusion by blood vessels Contains chondroblasts which produce new matrix until the end of adolesence Hyaline Cartilage Elastic Cartilage Fibrocartilage Connective Tissue
  22. 22. Hyaline Cartilage The most abundant cartilage in the body Provides support with a bit of pliability Found on the end of articular cartilage, the end of the nose, connects the ribs to the sternum, and supports the respitory passages Most hyaline cartilage is formed in the embryonic skeleton Cartilage Tissue Elastic Tissue Fibrocartilage
  23. 23. Elastic Tissue Nearly identical to hyaline cartilage, but contains more elastin fibers Found where strength and and stretchibility are a must Forms the ear and the epiglottis Hyaline Cartilage Fibrocartilage Cartilage Tissue
  24. 24. Fibrocartilage Fibrocartilage is a balance between both hyaline cartilage and elastic cartilage Found where strong support and the bility to withstand pressure is required, like intervertebral discs and the cartilage of the knee Hyaline Cartilage Elastic Cartilage Cartilage Tissue
  25. 25. Connective Tissue Proper Contains two subclasses- Dense Connective and Loose connective Connective Tissue Reticular Adiopose Areolar Regular Dense Irregular Dense
  26. 26. Recticular Connective Tissue Resembles Areolar connective tissue Fibers in this tissue are reticular fibers, which contain reticular cells in their network Forms a labryinth like stroma that supports free blood cells in the lymph nodes, spleen, and bone marrow Adiopose Areolar Regular Dense Irregular Dense
  27. 27. Adiopose Connective Tissue Similar to areolar tissue Store much more energy than Areolar Connective tissue Contain adiocytes and is very vascularized Constitutes 18% of a persons body weight Can develop almost anywhere, which some organs need to keep working Also referred to as white adiopose tissue to distinguish it from brown adiopose tissue Connective Tissue Proper Areolar Dense Regular Dense Irregular
  28. 28. Areolar Connective Tissue Functions include supporting and binding other tissues, holding body fluids, defending against infection, and storing nutrients The most widely distributed connective tissue throughout the body Adopose Reticular Dense Regular Dense Irregular Connective Proper
  29. 29. Regular Dense Connective Mainly made up of fiber, which run in the same direction.This gives a great resistance to tension Contains fibroblasts that make the fibers Form the tendons and aponeuroses and the fascia Adopose Areolar Reticular Irregular Dense Connective Tissue Proper
  30. 30. Irregular Dense Connective Tissue Has the same makeup as the regular variety, but the collagen fibers are arranged differently and the fibers are thicker Forms where tension is exerted in more than one direction. Found in the dermis, and the fibrous coverings of some organs Connective Proper Adopose Areolar Reticular Dense Regular Dense Irregular

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