词根：blast, blasto = germ 胚, 芽

  词根blast来源于希腊语 blastos 意思是“胚,芽”，blasto- 为 -blast- 的变体,

  引申阅读：胚芽和硫基一点联系也没有：-sulf(o)- / -sulph(o)- 硫代 / 硫基，来源于拉丁语 sulfur，后两者为英国英语拼法，如：desulfur 脱硫、sulfur 硫磺 / 用硫磺处理。

同源词：

1. ectoblast [ecto- 外，blast 胚]
  n.外胚层

2. ectoblastic [见上，-ic 形容词后缀]
  adj. 外胚层的

3. entoblast  [ento- 内，blast 胚]
  n. 内胚层

4. entoblastic  [见上，-ic  ...的确良]
  adj. 内胚层的

5. endoblast [endo- 内，blast 胚]
  n. 内胚层

6. epiblast [epi 上面，外，blast 胚]
  n. 上胚层，外胚层

7. hematoblast [hemato 血，blast 芽，孢]
  n.血小板；血细胞

8. blastoderm  [blasto 胚，derm 皮，膜]
  n.胚膜，胚盘

9. blastogenesis [blasto  胚芽，gen 生长，-esis名词后缀]
  n. 胚生，芽生

10. blastopore  [blasto 胚，pore 孔]
  n.胚孔

11. blastocyst  [blasto  胚，cyst 囊]
  n.胚囊；胚泡

12. mesoblast [meso- 前缀意思是“中间”，blast 胚]
  n.中胚层 （处在中间层的胚，即中胚层）

词根词缀：blasto-, blast-, -blast, -blastic

【来源及含义】Greek: germ, bud; shoot, formative cell or layer; of or pertaining to an embryonic or germinal stage of development

【同源单词】blast, blastema, blastocarpous, blastocyst, blastocyte, blastoderm

词根词缀：cole-, coleo-

【来源及含义】Greek: sheath, scabbard; in medicine, a combining form that means "sheath" or "vagina"

【相关描述】Don't confuse this cole-, "sheath, vagina" unit with the following -cole, -cola, -coles (living among, dwelling in); coll-, col- (neck); collo-, coll- (glue); colo-, col- (colon, large intestine); and colon-, coln- (farm, settlement) units.

【同源单词】coleitis, coleocele, coleocystitis, Coleoptera, coleopterophilous, coleoptosis

词根词缀：cysto-, cyst-, cysti-, cystido-

【来源及含义】Greek: sac or bladder which contains fluid [or gas, as in pneumatocyst]; urinary bladder

【同源单词】cholecystitis, cholecystogram, cysticerus, cystine, cystitis, cystocarcinoma

词根词缀：dacryo-, dacry-

【来源及含义】Greek: tear, tears; as from a tear-gland or the tear-glands in the eyes

【相关词根词缀】Related "tear, tears; as in crying" word unit: lacrimo-.

【同源单词】adacrya, conjunctivodacryocystorhinostomy, conjunctivodacryocystostomy, dacryadenalgia, dacryadenitis, dacryagogatresia

词根词缀：ethm-, ethmo-

【来源及含义】Greek: strainer, sieve

【同源单词】dacryocystoethmoidostomy, esoethmoid sinus, esoethmoiditis, ethmoid, ethmoidectomy, ethmoiditis

词根词缀：-ic

【来源及含义】Greek: a suffix; pertaining to; of the nature of, like; in chemistry, it denotes a higher valence of the element than is expressed by -ous

【同源单词】abdominocystic, abdominopelvic, abdominoscopy, abdominothoracic, abiogenetic, abiogenic

词根词缀：oophoro-, oophor-

【来源及含义】Greek: ovary, egg [literally, "egg-carrier"; extended to mean ovary]

【同源单词】oophorectomize, oophorectomy, oophorites, oophoritis, oophorocystectomy, oophorocystosis

词根词缀：pyel-, pyelo-

【来源及含义】Greek: renal pelvis; especially of the kidney; from "tub, vat, basin, and trough"

【同源单词】endopyelotomy, pyelic, pyelitis, pyelocystitis, pyelogram, pyelography

词根词缀：steato-, steat-

【来源及含义】Greek: fat; suet, tallow

【相关词根词缀】Related fat-word units: adipo-; lard; lipo-; obeso-; oleo-; omento-; pimelo-; pio-; sebo-.

【同源单词】steatite, steatitis, steatocele, steatocryptosis, steatocystoma, steatogenous