| Main Entry: | membrane |
| Part of Speech: | noun |
| Definition: | covering layer |
Synonyms: |
film, lamina, leaf, mucosa, placenta, sheath, sheet |
| Notes: | tissue is a collection of cells that form a thin but tough structure and each type of tissue has a special function; a membrane is a thin layer of tissue |
| Main Entry: | bag of waters |
| Part of Speech: | noun |
| Definition: | amniotic sac |
Synonyms: |
afterbirth, amnion, arachnoid membrane, placenta, water bag |