| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 1,737,446,688 visitors served. |
|
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
endoderm |
Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia | 0.03 sec. |
|
endoderm /en·do·derm/ (en´do-derm) the innermost of the three primitive germ layers of the embryo; from it are derived the epithelium of the pharynx, respiratory tract (except the nose), digestive tract, bladder, and urethra.endoder´malendoder´mic
endoderm [en′dədurm] Etymology: Gk, endon + derma, skin (in embryology) the innermost of the cell layers that develop from the embryonic disk of the inner cell mass of the blastocyst. From the endoderm arises the epithelium of the trachea, bronchi, lungs, GI tract, liver, pancreas, urinary bladder, anal canal, pharynx, thyroid, tympanic cavity, tonsils, and parathyroid glands. The endoderm thus comprises the lining of the cavities and passages of the body and the covering of most of the internal organs. Compare ectoderm, hypoblast, mesoderm. endoderm see entoderm. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
|
| ? Mentioned in | ? References in periodicals archive | |
|---|---|---|
3) If, after reaching its most cephalic position, the notochord retains an attachment to the pharyngeal endoderm as it regresses toward the skull base, an invagination of the developing pharyngeal mucosa is created. Average methylation in day 21 tail tissues from a subset of genistein-supplemented animals (n = 5) was highly correlated with average methylation in day 150 tissues derived from the ectoderm (brain and tail), mesoderm (kidney), and endoderm (liver) (Figure 4). This included men with either Seminoma (made up of primarily young germ cells, growing slowly, staying relatively immobile, and accoungint for 40 percent of testicular cancers) or Teratoma (consisting of cysts that contain one or more of the three main types of cells present in embryos--ectoderm, mesoderm, and endoderm cells) type cancers and a range of time lags in seeking medical help. |
| Medical Dictionary |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup | Partner with us |
|---|