Animal tissue

Descrição

Tissue level structural organisation in animals
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Resumo de Recurso

Animal tissue
  1. Epithelial tissue
    1. Simple
      1. Squamous
        1. 1.single layer
          1. 2.compactly arranged
            1. 3. flat
              1. 4. prominent nuclei
                1. 'pavement/tesselated epithelium'
                  1. eg. inner lining of blood (endothelium) vessels, lining of alveoli, Bowman's capsule, lining of coelom (mesothelium),
                    1. directly over basement membrane/ avascular/ blood from basement membrane
          2. Cuboidal
            1. 1. single layer cube shaped cells
              1. 2. usually present in glands
                1. Brushbordered (Microvilli)
                  1. eg. PCT (proximal convulated tubules)
                  2. Ciliated cuboidal
                    1. eg. Parts of nephron (collecting ducts)
                    2. Germinal epithelium (eg of cuboidal in testis and ovary (makes sperm and ovum))
                  3. simple cuboidal
                    1. eg. Thyroid follicles, sweat glands, Pancreas acini, Iris, Choroid
                  4. Columnar
                    1. 1. single layer of column like cells
                      1. 2. nucleus situated on basal side
                        1. Simple columnar
                          1. eg Bile duct, Liver
                          2. Brushbordered columnar
                            1. eg. small intestine
                            2. Ciliated columnar
                              1. eg. Fallopian tubes, Ependymal epithelium (ventricles of brain)
                              2. Stereociliated columnar
                                1. eg. Epididymis, Vas deferens, Internal ear
                            3. Pseudostratified
                              1. False appearance of layers
                                1. 2 types of cells (long cells, short cells)
                                  1. nucleus lies at different height but both are connected to basement membrane
                                    1. eg. PSCGE (psc glandular epithelium), Trachea, Bronchi, nasal chamber(respiratory epi)
                            4. Glandular Epithelium
                              1. Unicellular
                                1. isolated glandular cells
                                  1. eg. Goblet cells of ailmentry canal
                                2. Multicellular
                                  1. Simple
                                    1. single unbranched duct
                                      1. tubes (tubules)
                                        1. sacs (acini, alveoli)
                                      2. Compound
                                        1. Branched system of ducts
                                          1. pancreas, salivary gland
                                        2. Exocrine
                                          1. 2 parts (secretory and duct)
                                            1. ducts transport secretion to site of action
                                              1. eg. salivary gland, tear gland, gastric gland, intestinal gland, mammary glands, sebaceous glands, earwax
                                          2. Endocrine
                                            1. lack ducts, (ductless glands)
                                              1. secretions directly poured in tissue fluid (hormones)
                                                1. eg. Insulin, Glucagon, adrenaline
                                      3. Compound
                                        1. Stratified
                                          1. Transitional
                                        2. Connective tissue
                                          1. Muscle tissue
                                            1. Neural tissue

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