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ANP LEC2, Histology ---ways to study tissue, Epithelial Tissue/ Epithelium…
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Connective Tissue
4 种类型
CT Proper
Loose
Areolar 蜂窝组织
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作用&位置: 在 epithelial 下(lamina propria 固有层); cushion organs, inflammation, reserve fluid
adipose (fat tissue)
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作用&位置: insulate heat防止丢失热量;支撑保护organ;在kidney, eyeballs, breast
Reticular (网状组织)
特点:gel-like ground substance, more reticular fiber,
作用&位置:形成soft internal skeleton 支撑cells; 在lymphoid organs (淋巴结, bone marrow, spleen)
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Cartilage
特点: form matrix, imperceptible 不明显的,透明的
作用&位置:support & reinforce, 形成most embryonic skeleton, 覆盖long bone, 在nose, trachea, larynx, coastal cartilage 肋骨软骨...
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作用 & 位置: 维持结构形状, 在external war,( pinna),epiglottis.
特点:less firm than hyaline, thick collagen fiber
作用 & 位置: tensile strength - 吸收compressive shock, 在intervertebral discs( collagen fibre) , meniscus, discs of knee joint
主要特点:1.matrix 分泌于 chondroblast ( during growth) & chondrocytes (adults)软骨细胞在lacunae(裂隙安)找到
- avascular:从dense regular CT—perichondrium 软骨膜得到营养
- chondrocytes loss导致sports injure
Bone
特点: living tissue, highly vascularized ( hematopoiesis 造血作用), osteon 骨单位
作用&位置:support, protect;
储存 calcium, minerals, fat;
marrow—形成 cell的地方 (hematopoiesis)
Blood
特点:红( erythrocytes)&白细胞 (lymphocytes, neutrophil) in a fluid matrix (plasma)
作用&位置: 运输呼吸的gas, nutrients, waste; 在blood vessels; fiber are soluble in clotting
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结构组成部分
Ground substances
特点:unstructured, gel-like
有:interstitial fluid, cell adhesion proteins, proteoglycans
Fibers
有:
Collagen fiber
特点:High tensile strength , tough韧性好
Elastic fiber
特点:stretch & recoil, 细长 (elastin弹力蛋白)
Reticular fiber
特点:support blood vessels, fuzzy net , 柔软,细短
Cells
后缀Blast: forming, dividing immature cells
后缀cyte: nature, specialized cell, maintain CT
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