 |
| |||
| membrane A thin tissue that encloses or lines biological cells, organs, or other structures. It consists of a double layer of lipids with protein molecules between the two layers. Membranes are permeable to water and fat-soluble substances but not to such polar molecules as sugars | |||
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error
| Get short URL | Language Selection Tips