Connective tissue by Yethmi Amarawardhana https://padlet.com/u3284481/bkfa345clubfs8dk Post anything anywhere en-us 2025-02-09 07:53:27 UTC 2025-02-11 12:59:48 UTC hello@padlet.com Tissue types u3284481 https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323283118

  • Epithelial tissue: covers internal and external surfaces of the body. lines body cavities.

  • Connective tissue: supports, protects, and gives structure to tissues and organs

  • Muscle tissue: tissue movement by creating force, heat production

  • Nervous tissue: detects changes and transmits signals between different body parts (action potentials)

    • ]]>     2025-02-10 22:55:23 UTC https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323283118     CONNECTIVE TISSUE u3284481 https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323284303

  • Connects/separates and supports other tissue types.

    • ]]>     2025-02-10 22:57:27 UTC https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323284303     Development of connective tissue u3284481 https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323290878 All connective tissue develops from mesenchyme (collection of undifferentiated cells).

    1. Mesenchyme develops into immature cells (-blast: fibroblast, chondroblast, osteoblast)

    2. Immature cells divide and make up the extracellular matrix (protein fibre + ground substance)

    3. Immature cells differentiate into mature cells (-cyte: fibrocyte, chondrocyte, osteocyte)

    4. Mature cells regulate and maintain the extracellular matrix. They have reduced capacity for cell division.

    ]]>     2025-02-10 23:07:02 UTC https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323290878     Connective tissue cells u3284481 https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323296315

  • Fibroblasts: Most common tissue cells. Secrete extracellular matrix

  • Macrophages: Develop from monocytes. Engulf cellular waste and bacteria via phagocytosis.

  • Plasma cells: Antibodies that attack foreign substances (B-lymphocyte)

  • Mast cells: Inflammatory response (produce histamine --> dilates blood vessels)

  • Adipocytes: fat storage cells (store triglycerides)

  • Leukocytes: White blood cells. Part of the immune response (allergies/infections)


    • ]]>     2025-02-10 23:16:14 UTC https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323296315     Extracellular matrix u3284481 https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323296514 2025-02-10 23:16:34 UTC https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323296514 Protein fibres u3284481 https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323299794

  • Collagen fibres (bone, cartilage, tendons, ligaments): Large and strong. Provide tensile strength (thick, parallel bundles).

  • Elastic fibres (skin, blood vessels, lung tissue): Smaller in diameter. Thin branching fibres allow stretch (up to 150%) and recoil.

  • Reticular fibres (spleen, lymph nodes, liver): Fine/thin branching fibres. Make up supporting structure.

    • ]]>     2025-02-10 23:19:23 UTC https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323299794     Ground substance u3284481 https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323300062

  • Found between cells and fibres

  • Consistency depends on tissue type

  • Support of cells

  • Storage of water

  • Site of exchange (between blood and cells)

  • Can be fluid, semi-fluid, gelatinous or hard

    • ]]>     2025-02-10 23:19:46 UTC https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323300062     Proper u3284481 https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323302494 2025-02-10 23:23:45 UTC https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323302494 Specialised u3284481 https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323302720 2025-02-10 23:24:15 UTC https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323302720 Loose u3284481 https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323306068

  • Areolar: Random arrangement of fibres in semifluid ground substance. Connects and surrounds structures like skin, organs, and vessels.

  • Adipose: contains adipocytes (fat cells).

    White adipose tissue: energy reserve, insulates and protects organs.

    Brown adipose tissue: generates heat (has lots of mitochondria and blood vessels)

  • Reticular: Fine interlaced network of reticular fibres and cells. Supporting framework for organs like the liver, spleen, and lymph nodes

    • ]]>     2025-02-10 23:29:55 UTC https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323306068     Dense u3284481 https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323306561

  • Contains more fibres, less ground substance in-between

    1. Regular (tendons, ligaments): Collagen fibres arranged in parallel. Resists pulling forces from one direction (muscle-muscle, muscle-bone)

    2. Irregular (deep layers of skin, pericardium, GI tract): Collagen fibres arranged irregularly. Resists forces from different directions. Provide strength to tissue.

    3. Elastic (lung tissue, blood vessels): Made of elastic fibres. Ability to stretch and recoil.

    ]]>     2025-02-10 23:30:28 UTC https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323306561     Cartilage u3284481 https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323306931

  • Very low blood supply, therefore harder to heal if damaged

  • Can endure more stress due to gel-like consistency

    1. Hyaline (embryonic skeleton, external part of nose): The most abundant but weakest type. Gel-like ground substance surrounded by thin collagen fibres and chondrocytes. Reduces friction at the end of long bones and supports structure.

    2. Fibrocartilage (intervertebral discs, menisci, pubic symphysis): Dense bundles of collagen fibres. Resists weight-bearing and compression forces.

    3. Elastic (external ear, auditory canal, epiglottis): Elastic fibres surrounding chondrocytes. Provides support and elasticity in non-weight-bearing structures.

    ]]>     2025-02-10 23:31:14 UTC https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323306931     Bone u3284481 https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323307092

  • Osteocytes inside hard extracellular matrix of calcium and phosphorous.

  • Supports soft tissue.

  • Protects delicate structures.

  • Promotes muscle movement.

    1. Compact: Repeating unit- osteon. Strong, and provides protection and support. Bears stress of growing.

    2. Spongy: Deliberately located where stresses are from different directions. Supports red bone marrow.

    ]]>     2025-02-10 23:31:34 UTC https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323307092     Blood u3284481 https://padlet.com/u3284481/bkfa345clubfs8dk/wish/3323307218

  • Only connective tissue type that does not contain fibres (ground substance and cells only)

  • A special type of liquid connective tissue

  • Made of blood plasma

  • Elements: red blood cells, white blood cells, platelets

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