Common types of cells

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Common types of cells

  1. 1. TYPES OF CELLS
  2. 2.  Students should be able to describe microscopic features & their sites of various cells and tissues present in our body. To identify the cells present in blood and their functions.
  3. 3. 1. EPITHELIUM2. CONNECTIVE TISSUE and MUSCLES3. INFLAMMATORY CELLS
  4. 4. TYPE OF EPITHELIUMA. SQUAMOUS SIMPLE SQUAMOUS1. Simple Squamous2. Simple Columnar3. Simple Cuboidal STRATFIED SQUAMOUS1. Pseudostratified columnar (Ciliated)2. Stratified Squamous
  5. 5. 1. EXOCRINE GLANDS2. ENDOCRINE GLANDSC. TRANSITIONAL
  6. 6. Epithelial tissueCovers surfacesLines tubes and body cavities
  7. 7. ClassificationDepending on Number of layers •One- simple •Two or more- stratifiedDepending on Shape of cell •Irregular, flat- squamous •Square-like- cuboidal •Column-shaped- columnar
  8. 8. Functions• protection• absorption• filtration• excretion• secretion• sensory reception
  9. 9.  Found where filtration or exchange is occuring like in circulatory system. Lines blood and Lymph vessels) The serous linings of pericardium, pleura and peritonium.
  10. 10. Squamous Epithelium
  11. 11.  Places that involve ABSORPTION and SECRETION… Stomach Large intestine Small intestine Gall bladder Respiratory tract
  12. 12. TYPES1. Simple2. Ciliated3. With microvilli striated border Brush border
  13. 13. Simple Columnar Epithelium
  14. 14.  Collect tubules of KIDNEYs Thyroid Gland ASSOCIATED w/ secretion.
  15. 15. Simple Cuboidal Epithelium
  16. 16.  This epitheium gives errorenous impression that there is one more layer of cells. The nuclei of these cells are disposed at different level. Cilia are never present on true stratified epithelium.
  17. 17. CiliatedPseudostratified Columnar Epithelium
  18. 18.  cells are flat or shield like PROTECTS from Exposure to friction This epithelium found at surface of skin, pharynx,linining of the mouth, oesophagus,anal canal and vagina.
  19. 19. KERATINISATIONStratifiedSquamousEpithelium EPIDERMIS SQUAMOUS EPITHELIUM
  20. 20.  Is a Stratified epithelium which contains cells that, due to stretching, change their shape, hence the name “TRANSITIONAL”. Also known as urothelium . Found in urinary tract.
  21. 21.  This properties allows for liquid to be store i.e. urine in the bladder ( an organ where this tissue is found) The apical cells are rounded and give an umbrella shaped or dome cells. The basal cells are roughly cuboidal. Intermediate cells are polygonal.
  22. 22. GLANDULAR EPITHELIA A gland is one or more cells which produce and secrete a product called secretion.
  23. 23.  Characteristic of the lining of the gastrointestinal tract. Glands that have this epithelium are1.Exocrine gland: these glands secrete their products into a system of channels or that convey the product to its final destination. E.g salivary gland.2.Endocrine gland:secrete their products or hormones into the underlying connective tissue and release their secretion directly into the blood. E.g thyroid gland.
  24. 24. 1.STRATIFIED SQUAMOUS - skin,oral cavity,oesophagus,vagina etc.2.GLANDULAR - GIT,pancreas,salivary gland,endocervix,endometrium,thyroid etc.3.TRANSITIONAL - urinary bladder,ureter,pelvis of kidney etc.
  25. 25. 1.Fibroblasts2.Adipose tissue3.Smooth muscle fibre and skeletal muscle.
  26. 26.  These maintain the integrity of supporting tissues by continuous slow turnover of the extracellular matrix constituents. Fibroblasts synthesize and secrete collagen molecules then assembles into fibrils that are cross linked into fibres in the extracellular matrix.
  27. 27.  Most numerous cells of connective tissue. Concerned with the production of collagen fibres. Collagen fibres provides strength. Also produce reticular and elastic fibres. In tissue sections appear to be spindle shaped and nucleus is flattened. Show branching processes when seen from surface.
  28. 28. FLAT NUCLEUS
  29. 29.  Cells which are adapted for storage of fat called as adipocytes. Adipose tissue has important role general metabolic process. Two main types:1.White adipose tissue : found in deep layers of skin. E.g adults2.Brown adipose tissue: small amount found in humans. E.g children
  30. 30.  Nutrition Mechanical function , keeps them in position. Cushioning effect. Insulation Heat generator.
  31. 31. Adipose TissueStorage,insulation,protection
  32. 32.  It is composed of elongated,multinucleate contractile cells k/s muscle fibres bound together by collagenous supporting tissue. Muscle is made up of numerous small fasciculi. Each muscle fibre has multiple nuclei arranged at the cell periphery.
  33. 33.  Cells are elongated,spindle shaped cells with tapered ends. Nucleus is centrally located in the cytoplasm at the widest part of the cell. Smf are bound together in irrerular,branching fasciculi, and these fasciculi are functional contractile unit.
  34. 34. 1. Polymorphonuclear cells2. Lymphocytes3. Eosinophills4. Plasma cells5. Macrophages6. Giant cells
  35. 35.  14-15 µm in size Nucleus deep purple Cytoplasm pink Small n specific granules Life span is 1-2 days
  36. 36.  Two types1. Small – 7-10µm2. Large - 10- 15µm Nucleus is round to oval Cytoplasm basophillic
  37. 37.  Size more then polymorphonuclear cell Nucleus bilobed mostly Cytoplasm large bright orange red granules,
  38. 38.  Usually not present in peripheral blood Occur in the marrow Have deeply basophillic cytoplasm with a perinuclear hallow. Eccentric nucleus
  39. 39.  Derived from B lymphocyte and clearly designed for synthesis of Igs. Cartwheel nucleus. They are found in – Chronic infections neoplasm allergic states , etc
  40. 40.  20 -70µm in size Irregular shape Cytoplasm may have vacuoles,cell debris or hemosiderin Abundant cytoplasm and small nuclei
  41. 41.  Langhan’s Foreign body Tuton’s Tumor
  42. 42. Thank you

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