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单词 Blood capillary
释义

Blood capillary

原声例句
心血管

The super-thin walls of the blood capillaries are a little bit leaky.

毛细血管的超薄壁略微渗出液体。

Osmosis-呼吸

The histamine causes blood capillaries to dilate and become leaky which brings more fluid and immune cells to the area where the mast cells are located.

组胺能使毛细血管的通透性增加,进而促进更多的体液和免疫细胞渗漏到肥大细胞所在处。

心血管

Although they are similar to blood capillaries, lymphatic capillaries are more permeable, and therefore they're more prone to allow the passage of proteins or even larger particles such as bacteria and viruses.

尽管它们与血毛细血管相似,但淋巴毛细血管的渗透性更强,因此它们更容易使蛋白质甚至细菌和病毒等更大的颗粒通过。

中文百科

微血管 Capillary

(重定向自Blood capillary)
血液流向消化系统的心脏动脉,到狭窄的小动脉,然后再狭窄仍然成为毛细血管。之后,该组织已灌注,毛细血管扩大成为小静脉,然后再拓宽更成为静脉,其中利润将血液输送到心脏。

微血管又称为毛细血管微丝血管,连接动脉与静脉,是由动脉分支为较小的动脉,再分支多次的血管。

微血管是管壁最薄的血管,只有一层细胞的厚度,利于细胞之间物质的交换。微血管弹性最差,管腔最小,以致流速最慢;血压则是居于动脉及静脉之间。

微血管的主要功能在于物质的交换:在肺微血管中,因微血管的氧气浓度小于肺泡中的浓度,氧气透过扩散作用进入微血管中,由红血球中的血红素运送至体内的组织细胞;而二氧化碳浓度高于肺泡中的浓度,二氧化碳透过扩散作用排出微血管,回到大气。在其他部位的微血管,因微血管中氧气浓度高于组织细胞中的浓度,氧气透过扩散作用进入组织细胞中;而二氧化碳浓度低于组织细胞中的浓度,二氧化碳透过扩散作用进入微血管,送至肺泡排出体外。

英语百科

Capillary 微血管

(重定向自Blood capillary)
Diagram of a capillary
Depiction of the major types of capillaries, showing fenestrations as well as intercellular gaps.

Capillaries (/ˈkæplɛriz/ in US; /kəˈpɪləriz/ in UK) are the smallest of a body's blood vessels (and lymph vessels) that make up the microcirculation. Their endothelial linings are only one cell layer thick. These microvessels, measuring around 5 to 10 micrometres (µm) in diameter, connect arterioles and venules, and they help to enable the exchange of water, oxygen, carbon dioxide, and many other nutrients and waste substances between the blood and the tissues surrounding them. Lymph capillaries connect with larger lymph vessels to drain lymph collected in the microcirculation.

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更新时间:2025/6/23 23:21:28