得得啪在线视频观看|免费污苹果香蕉荔枝丝瓜IOS|欧美日韩中文字幕完整版|国产精品v欧美精品v日韩精品|久草热8精品视频在线观看|强上轮流草的合不拢腿|岳把我用嘴含进满足我视频

淋巴管,又稱淋巴管道,
從身體組織運送一種名為淋巴的水樣液體,
通過稱為淋巴結的淋巴組織團過濾淋巴,
然后通過一系列較大的血管將其送回血液循環。
毛細血管從血漿中過濾出液體并輸送到組織中。
這種液體與水、氧氣和營養物質一起,
構成了細胞外空間的組織液。
毛細血管將大部分水以及二氧化碳和尿素等細胞廢物重新吸收到靜脈血流中。
淋巴毛細血管排出多余的細胞外物質,以幫助維持液體平衡和免疫功能。
淋巴毛細血管中疏松的內皮連接允許大分子和病原體進入,從而進入淋巴循環。
淋巴毛細血管匯聚成集合淋巴管。
淋巴結沿這些血管分布。
在淋巴結內部,
竇連接著由淋巴細胞濾泡組成的皮質
和布滿淋巴細胞、巨噬細胞及其他抗原呈遞細胞的髓質。
當淋巴液緩緩流過淋巴結時,
傳染性病原體和其他有害細胞(如癌細胞)會遇到免疫細胞,
免疫細胞要么將它們消滅,要么將其留存,
直到啟動免疫反應以針對淋巴結外的感染。
經過凈化的淋巴液主要由水、蛋白質和淋巴細胞組成,通過輸出集合淋巴管離開淋巴結。
血管壁的收縮將淋巴液推向接下來的瓣膜,瓣膜打開,
使淋巴液向前流動,同時防止回流。
集合淋巴管合并成淋巴干。
每個淋巴干從特定的身體區域引流淋巴,
并匯入兩條收集導管之一。
右淋巴導管
將頭部右側、右臂和胸部右側的淋巴引流至右鎖骨下靜脈,
而胸導管則將身體其余部位的淋巴輸送至左鎖骨下靜脈。
進入鎖骨下靜脈后,淋巴液重新回到血液循環中。

內容操作
視頻
教程課件
單詞卡片
Lymphatic vessels also called lymphatics
淋巴管,又稱淋巴管道,
carry a watery fluid known as lymph from body tissues
從身體組織運送一種名為淋巴的水樣液體,
filter lymph through packets of lymphoid tissue called lymph nodes
通過稱為淋巴結的淋巴組織團過濾淋巴,
and return it to the bloodstream through a series of larger vessels
然后通過一系列較大的血管將其送回血液循環·
Blood capillaries filter fluid from plasma into the tissues
毛細血管從血漿中過濾出液體并輸送到組織中·
The fluid in combination with water oxygen and nutrients
這種液體與水、氧氣和營養物質一起,
comprises interstitial fluid in the extracellular space
構成了細胞外空間的組織液·
Capillaries reabsorb most of the water and cellular wastes like carbon dioxide and urea into the venous bloodstream
毛細血管將大部分水以及二氧化碳和尿素等細胞廢物重新吸收到靜脈血流中·
Lymphatic capillaries drain the excess extracellular materials to help maintain fluid balance and immunity
淋巴毛細血管排出多余的細胞外物質,以幫助維持液體平衡和免疫功能·
Loose endothelial junctions in the lymphatic capillaries allow macromolecules and pathogens to enter joining lymph circulation
淋巴毛細血管中疏松的內皮連接允許大分子和病原體進入,從而進入淋巴循環·
Lymphatic capillaries converge into collecting vessels
淋巴毛細血管匯聚成集合淋巴管·
Lymph nodes occur along these vessels
淋巴結沿這些血管分布·
Inside a lymph node
在淋巴結內部,
sinuses connect the cortex comprised of lymphocyte follicles
竇連接著由淋巴細胞濾泡組成的皮質
and the medulla dotted with lymphocytes macrophages and other antigen presenting cells
和布滿淋巴細胞、巨噬細胞及其他抗原呈遞細胞的髓質·
As the lymph trickles through the node
當淋巴液緩緩流過淋巴結時,
infectious pathogens and other harmful cells such as cancerous tumor cells
傳染性病原體和其他有害細胞(如癌細胞)會遇到免疫細胞,
encounter the immune cells which either destroy them or retain them
免疫細胞要么將它們消滅,要么將其留存,
until an immune response can be mounted to target the infection outside the node
直到啟動免疫反應以針對淋巴結外的感染·
The cleansed lymph consisting mainly of water protein and lymphocytes exits the node via an efferent collecting vessel
經過凈化的淋巴液主要由水、蛋白質和淋巴細胞組成,通過輸出集合淋巴管離開淋巴結·
The vessel wall contractions push the lymph to the next valve
血管壁的收縮將淋巴液推向接下來的瓣膜,瓣膜打開,
which opens and allows lymph to move forward while preventing backflow
使淋巴液向前流動,同時防止回流·
The collecting vessels combine into lymphatic trunks
集合淋巴管合并成淋巴干·
Each trunk drains lymph from a particular body region
每個淋巴干從特定的身體區域引流淋巴,
and empties into one of two collecting ducts
并匯入兩條收集導管之一·
The right lymphatic duct
右淋巴導管
which drains lymph from the right side of the head the right arm and the right side of the thorax to the right subclavian vein
將頭部右側、右臂和胸部右側的淋巴引流至右鎖骨下靜脈,
or the thoracic duct which delivers lymph from the rest of the body to the left subclavian vein
而胸導管則將身體其余部位的淋巴輸送至左鎖骨下靜脈·
After passing into the subclavian veins lymph returns to the bloodstream
進入鎖骨下靜脈后,淋巴液重新回到血液循環中·