Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 40

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  human embryo
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
The primordia of the sympathetic trunk ganglia were traced on serial sections of 10 embryos at stage 13 (32 postovulatory days). It was found that in all embryos, these primordia were present in the thoracic level T4 to T9 and they appeared as scattered aggregates of cells lying dorsally and laterally to the dorsal aortae. (Folia Morphol 2009; 68, 4: 215–217)
White communicating rami were traced in 8 human embryos of developmental stages 14 and 15 (aged 33 and 36 postovulatory days, respectively). In embryos at stage 14 the white communicating rami were found in the spinal nerves T1 to T9. In embryos at stage 15 the white communicating rami were present at the spinal cord levels T1 to L3. (Folia Morphol 2010; 69, 2: 75–77)
The study was conducted on 15 embryos aged 5 weeks. The primordium of Meckel’s cartilage appears at stage 13 (32 days) as a rounded structure composed of fusiform and polygonal cells, which blend with other cells of the mandibular process. At stages 14 and 15 (33 and 36 days) Meckel’s cartilage forms a well delineated core of small densely packed cells.
Vestibular ganglion was investigated in human embryos during developmental stages l3-23 (34-56 postovulatory days). Branches of the vestibular ganglion forming ampullar nerves were observed in ernbryos at stage I5. During the last embryonic stages (stage 22 and 23) the utriculo-ampullar, posterior ampullar, and saccular nerves were clearly distinguished.
Investigations were made on .serial sections of human embryos at developmental stage 23 (56 days). The oculomotor complex in embryos at this stage consists of lateral, median, and accessory nuclei. The lateral (chief) nucleus forms the greatest part of the oculomotor complex and it is subdivided into ventromedial and dorsolateral groups. Between the posterior portions of lateral nuclear groups is the median nucleus. Dorsally and medially to the lateral nucleus is the accessory (parasympathetic) nucleus.
Study was carried out on serial section of 45 human embryos of stages 13 to 23. The urorectal septum develops from three folds: single superior and two lateral ones. Development of the urorectal septum begins at stage 13 when the superior fold between the hindgut and allontois appears. At stage 15, all three folds unite to from complete septum, reaching the cloacal membrane and dividing the cloaca into anterior compartment, the primary urogenital sinus and the posterior compartment rectum.
The epidural space is seen in embryos at stage 17 (41 days) on the periphery of the primary meninx. During stage 18 (44 days) the dura mater proper appears and the epidural space is located between this meninx and the perichondrium and contains blood vessels. During the last week of the embryonic period (stages 20–23) the epidural space is evident around the circumference of the spinal cord. On the posterior surface it is found between the dura mater and the mesoderm of the dorsal body wall.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.