Absorption · 吸收
| English | 中文 | Pinyin · 拼音 |
|---|---|---|
| absorption/əbˈsɔːpʃn/ | 吸收 | xī shōu |
| villi/ˈvɪlaɪ/ | 绒毛 | róng máo |
| large intestine/lɑːdʒ ɪnˈtestɪn/ | 大肠 | dà cháng |
| faeces/ˈfiːsiːz/ | 粪便 | fèn biàn |
Getting food into the blood
- Once food is digested into small soluble molecules, it must pass into the blood to reach the cells.
- This is absorption 吸收, and it happens mainly in the small intestine.
把食物送进血液
- 一旦食物被消化成小的可溶分子,它必须进入血液以到达细胞。
- 这是吸收(absorption),它主要发生在小肠。
Most absorption of digested food happens in the: · 消化食物的大部分吸收发生在:
The small intestine, lined with villi, absorbs digested food. · 内衬绒毛的小肠吸收消化的食物。
The tiny finger-like folds of the small intestine wall are called . · 小肠壁的微小指状褶皱叫做。
Villi give the huge surface area for absorption. · 绒毛给出吸收的巨大表面积。
Built for absorption
- The small intestine is very long and its wall is folded into millions of tiny villi 绒毛.
- This gives a huge surface area for absorbing digested food.
A villus has a thin wall, a capillary network and a lacteal for fast absorption
为吸收而建
- 小肠非常长,它的壁折叠成数百万个微小的绒毛(villi)。
- 这给出一个巨大的表面积来吸收消化的食物。
一个绒毛有一个薄壁、一个毛细血管网和一个乳糜管,用于快速吸收
Absorption at the villi · 在绒毛处的吸收
The small intestine is lined with millions of villi that give a huge surface area for absorbing digested food. · 小肠内衬数百万个绒毛,给出一个巨大的表面积来吸收消化的食物。
Villi increase the rate of absorption by providing: · 绒毛通过提供以下哪种来增加吸收速率:
Villi multiply the surface area for absorption. · 绒毛倍增吸收的表面积。
Which adaptations of a villus speed up absorption? (Select all that apply.) · 一个绒毛的哪些适应加快吸收?(选择所有适用项。)
A thick coating would slow absorption; the others speed it up. · 一个厚涂层会减慢吸收;其他的加快它。
Adaptations of a villus
- Each villus has a thin wall (one cell thick) for a short diffusion distance.
- A rich blood supply carries absorbed food away, keeping the gradient steep.
一个绒毛的适应
- 每个绒毛有一个薄壁(一个细胞厚)以有一个短扩散距离。
- 丰富的血液供应运走被吸收的食物,保持梯度陡峭。
The large intestine absorbs most of the remaining water. · 大肠吸收大部分剩余的水。
Water is reabsorbed there before faeces are egested. · 在粪便被排遗之前,水在那里被重新吸收。
The large intestine 大肠
- The large intestine absorbs most of the remaining water.
- What's left (undigested fibre) is egested as faeces 粪便.
Surface area is everything for absorption. The villi (and microvilli on them) multiply the surface area enormously. A smooth gut would absorb food far too slowly to keep you alive.
大肠
- 大肠吸收大部分剩余的水。
- 剩下的(未消化的纤维)作为粪便被排遗。
表面积对吸收是一切。 绒毛(以及它们上面的微绒毛)极大地倍增表面积。一个光滑的肠道吸收食物太慢,无法让你活着。
You've got it
- absorption of digested food happens mainly in the small intestine
- villi give a huge surface area; thin walls + rich blood supply speed absorption
- the large intestine absorbs water; fibre is egested
你掌握了
- 消化食物的吸收主要发生在小肠
- 绒毛给出一个巨大的表面积;薄壁 + 丰富的血液供应加快吸收
- 大肠吸收水;纤维被排遗