Embryonic circulation
Summary
Description
The starting sequence shows a 5-day-old blastocyst in the uterine cavity viewed under low magnification. All layers of the uterus are listed. The next sequence shows a 6-day-old blastocyst near the endometrium under higher magnification. The structures of the blastocyst and the endometrium are shown. The composition and subdivision of the functionalis on compact and spongy layers as well as the endometrial vascularization are described.
In the next sequence, on the 7th day, the blastocyst starts to penetrate into the endometrium, while the sycytiotrophoblast begins to erode the surface epithelium and the decidual cells.... (more)
The starting sequence shows a 5-day-old blastocyst in the uterine cavity viewed under low magnification. All layers of the uterus are listed. The next sequence shows a 6-day-old blastocyst near the endometrium under higher magnification. The structures of the blastocyst and the endometrium are shown. The composition and subdivision of the functionalis on compact and spongy layers as well as the endometrial vascularization are described.
In the next sequence, on the 7th day, the blastocyst starts to penetrate into the endometrium, while the sycytiotrophoblast begins to erode the surface epithelium and the decidual cells. Around day 9, the proliferating syncytiotrophoblast forms the trophoblastic lacunae, while the ectodem, extracelomic and amniotic cavities form within the blastocyst of the endoderm. In parallel with the growth of the blastocyst, the secondary chorionic villi grow and become invaded by the extraembryonic mesoderm. The connecting stalk attaches the embryo with the mesoderm of the future chorionic plate. The embryo itself consists of three layers: the endoderm, the ectoderm, and the intraembryonic mesoderm that grows between them. The yolk or vitelline sac and the amniotic cavity are visible.
In an 18-day-old embryo, the blood vessels, which have developed within the extraembryonic mesoderm of the chorion villi, chorionic plate, wall of the yolk/vitelline sac, and the connecting stalk, enter into contact with the blood vessels of the intraembryonic mesoderm, thus establishing the basis for embryonic circulation.
The next sequences show the blood direction in three components of the embryonic circulation viewed somewhat later in 3D. For this purpose, the circulatory system of a 28-day-old embryo is schematically illustrated and described.
First, the intraembryonic circulation is animated and summarized in the form of a circle with legends corresponding to the blood vessels through which the blood has flown. According to the same principle, the vitelline or omphalomesenteric and the umbilical circulation are animated and summarized.
The fourth circulation belonging to the embryonic circulation, i.e. the pulmonary circulation, is treated under Fetal circulation.
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Details
5MB in size
201 pictures
1 chapters
10 legend panels
Version 1.0
Collections
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| All of Embryodynamics (56 animations) | $599.00 | |
| Amnion, Aortic arches, Blood and blood vessels, Body cavities, Central nervous system, Chromosomal anomalies, Cleavage, Cloaca, Cycles, Deciduae, Descent of sexual organs, Diaphragm, Digestive system, Ear, Embryology beginning, Embryonic circulation, Endochondral ossification, Endocrine glands, External genitalia, Eye, Face, Fertilization, Fetal circulation, Gametogenesis, Gastrulation, Gonads, Heart, Implantation, Integumentary system, Kidney, Liver, Long bone growth in diameter, Lymphatic system, Membranous ossification, Mesoderm, Myogenesis, Nerve fibres, Notochord, Olfactory, Pancreas, Pericardial reflexions, Pharyngeal arches, Placenta, Prostate, Respiratory system, Secondary ossification, Sex differentiation, Skeleton, Somites, Teeth, Tongue, Twins, Umbilical cord, Urinary bladder, Uterus during pregnancy, Veins | ||
Structure
View the structure of the Embryonic circulation animation without thumbnails:
- EMBRYONIC CIRCULATION
Animated scheme
- General view of the embryonic circulation
- THE END
RELATED TOPICS are covered in the following animations:
Amnion, Blood and Blood vessels, Fetal circulation, Gametogenesis, Heart, Kidney, Liver, Implantation, Mesoderm, Umbilical cord, Veins.
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- Amnion
- Aortic arches
- Blood and blood vessels
- Body cavities
- Central nervous system
- Chromosomal anomalies
- Cleavage
- Cloaca
- Cycles
- Deciduae
- Descent of sexual organs
- Diaphragm
- Digestive system
- Ear
- Embryology beginning
- Embryonic circulation
- Endochondral ossification
- Endocrine glands
- External genitalia
- Eye
- Face
- Fertilization
- Fetal circulation
- Gametogenesis
- Gastrulation
- Gonads
- Heart
- Implantation
- Integumentary system
- Kidney
- Liver
- Long bone growth in diameter
- Lymphatic system
- Membranous ossification
- Mesoderm
- Myogenesis
- Nerve fibres
- Notochord
- Olfactory
- Pancreas
- Pericardial reflexions
- Pharyngeal arches
- Placenta
- Prostate
- Respiratory system
- Secondary ossification
- Sex differentiation
- Skeleton
- Somites
- Teeth
- Tongue
- Twins
- Umbilical cord
- Urinary bladder
- Uterus during pregnancy
- Veins