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ANAT 1502 Important Embryo Images

ANAT 1502 Important Embryo Images - Plasma membrane 8 Thld...

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Unformatted text preview: Plasma membrane 8 Thld: outer Iongltudlnal flbers Outer acrosomal membrane 9 Mltochondrlon Acrosome 10 Axoneme Inner acrosomal membrane 11 Anulus Nucleus 12 Rlng flbers melmal oentrlole 13 Peripheral double tubull Rest of the dlstal oentrlole 14 Central slngle tubull 1 2 3 4 5 6 7 Follicle stages In the ovary 0®®00¢D€9 Primordial folllcie Primary folllcle Secondary folllcie Tertiary follicle Antral follicle Cumulus oophorus 'l'heca folllmll Stratum granulosum [granulosa Basal lamina between theca and granulosa 1o Theco externa (rlch In vessels) 11 Granulosa 12 Peritoneal cavity 13 Peritoneal epithelium and tunlca o o a e o o 0 14 gvfigramedulla 1s Ovarian cortex (8 follicular zone) 1 2 3 4 5 G 7 8 9 Under the peritoneal epithelium Iles the tunica albuginea that Is rich In vessels and ilbers. Immediately under thls follows the ovarian cortex: it consists of the follicles and connective tissue that Is also rich in vessels (= stroma ovaril). The large tertiary ibllicles are surrounded by a vessel-rich theca extema. Blood and lymph vessels are to be found In the loom connective tissue of the ovarian cortex. '866 Temporal course of the preimplantation stages Temporal course of the prelmplantatlon stages cne. Provides detailed Information about the structure at the germ eel. embryonic structures non-embryonic structures '866 1 2 3 4 5 6 7 Possible ectopic implantation zones Possible ectopic implantation zones Infundlbular In the falloplan tube (most frequent) Interstltlal In the lower uterus segment (later placenta praevla) Abdomlnal In the pelvlc area Normal fertlllzatlon always oomrs outslde the utens, namely ln the outer thlrd of the tube. The fertlllzed human oocyte mlgrates through the tube and Implants Itself on the 6th day In the endometrlum. Varlom factors, though, can cause thls mlgratlon to be delayed. Thls then leads to the blastocyst lodglng at that Iocatlon where It flnds Itself. Most frequently, thls happens In the tube (99% of the EUGs are tube pregnancies). The extra-uterine gravldlty (EUG) Is a rare, but serious oompllcatlon (2.5% of all pregnancies) became severe haemorrhages can thereby ensue. Also sterlllty can often arlse due to an EUG, caused by the rupture of the tube. Dlfiere ntlatlon of the blastocyst Differentiation of the biastocyst Endobllfl o! the umblllcal vesicle V = Sensitive zones that can be activabd for additional information. Table of the critical phases during human development Table of the critical phases durl 9 human developme - Severe oon . enital abnormalities Less severe abnormalities and funktional disorders Embryonic period( ()weeks Fetal period (weeks) Hahn—unnum- Abnorlmlilee OHIO neural Ilbe>8mllbnhl relardelon CNS abnonnalitles Cardiac abnomnllleo Cardiac abnomllfles ———— _W.....,.... "WW ---- m -m mm mm ---- =- cm... ---- : earlocelon deal-lees Ears — i m E » Dorsal vrew otthe mesodermal structures In stage 10, ca. 28 days Paraxlal mesoderm Intermedlary mesoderm Lateral plate mesoderm Ectoderm Somlte Somltoooel Neural tube Somlts Umbilical veln Dorsal aorta (palred) Endoderm Notochord 10 Splanchnopleura 11 Coelom 12 Somatopleura A I C 1 2 3 4 5 6 7 I 9 000®0®0 ...
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