@anitacheung83

6 years ago

Function of connective tissue (most abundant tissue in the body) 1. Binding and supporting 2. Protecting 3. Insulating 4. Storing reserve fluid and energy 5. Transporting substances within the body 6. Movement Types of Connective tissue • Proper connective ◦ Fat - provide insulation and fuel storage • Cartilage connective ◦ Most - avascular (no blood vessels) • Bone connective • Blood connective ◦ Transportation Characteristic of Connective tissue • They are all develop in the same origin - Mesenchyme - loose and fluid embryonic tissue • Different degree of vascularity and blood flow • All connective tissues are mostly composed of nonliving material - extracellular matrix Extracellular matrix components 1. Ground substance - - A watery, rubbery unstructured material that fills in the spaces between cells and protect cell from their surrounding - Flexible, made of starch and protein molecules mixed with water - Proteoglycans (protein) from each sprouts lots and lots of long, starchy strands called Glycosminoglygans (GAGs) radiating out from those protein. - It clumps together to trap water 2. Fibers - Provides support and structure to the shapeless ground substances Types of fibres • Collagen fibers (protein) ◦ Strongest and most abundant type of fibre • Elastic fibers ◦ Long thin, a branding framework within the matrix ◦ made out of protein elastic ‣ Allow to stretch and coil ◦ Find in skin, lungs and vessel wall • Reticular fibers ◦ Short, finer collagen fibres ◦ With glycoprotein ◦ Form sponge like-networks that cradle and support Immature cell are called blast • Means forming • Stem cells still dividing and replicate themselves • Function: to secrete the ground substance and fibres that form its unique matrix Types of immature cells (blast --> cytes) • Chondroblasts - the blast cell of cartilage • Osteoblast - the blast cells of bone tissue • After blast they develop into cytes, but cytes can go back to blast, if they need to repair or generate a new matrix PS: Thank you for all the thank you sss ~ btw I find it hard to watch the whole video RIGHT before an exam, that's why I "copy and paste" it. I hope it helps :)

2.2K |