Timeline Comparisons: Difference between revisions
mNo edit summary |
mNo edit summary |
||
Line 21: | Line 21: | ||
{{Animals}} | {{Animals}} | ||
==Systems== | ==Human Systems== | ||
===Neural=== | ===Neural=== | ||
Line 29: | Line 29: | ||
===Respiratory=== | ===Respiratory=== | ||
{{Respiratory Species Comparison table}} | {{Respiratory Species Comparison table}} | ||
===Placenta=== | ===Placenta=== | ||
{{Human Villi Timeline table}} | {{Human Villi Timeline table}} | ||
===Spleen=== | |||
{{Embryonic Spleen Timeline Table}} | |||
==References== | ==References== |
Revision as of 23:22, 31 May 2018
Embryology - 24 Apr 2024 Expand to Translate |
---|
Google Translate - select your language from the list shown below (this will open a new external page) |
العربية | català | 中文 | 中國傳統的 | français | Deutsche | עִברִית | हिंदी | bahasa Indonesia | italiano | 日本語 | 한국어 | မြန်မာ | Pilipino | Polskie | português | ਪੰਜਾਬੀ ਦੇ | Română | русский | Español | Swahili | Svensk | ไทย | Türkçe | اردو | ייִדיש | Tiếng Việt These external translations are automated and may not be accurate. (More? About Translations) |
Introduction
The timeline of human development has a specific page. This page attempts to bring together many different systems and species timelines.
Carnegie Comparison
Carnegie | Stage | |||||||||||||||||||||||
Human | Days | 1 | 2-3 | 4-5 | 5-6 | 7-12 | 13-15 | 15-17 | 17-19 | 20 | 22 | 24 | 28 | 30 | 33 | 36 | 40 | 42 | 44 | 48 | 52 | 54 | 55 | 58 |
Mouse | Days | 1 | 2 | 3 | E4.5 | E5.0 | E6.0 | E7.0 | E8.0 | E9.0 | E9.5 | E10 | E10.5 | E11 | E11.5 | E12 | E12.5 | E13 | E13.5 | E14 | E14.5 | E15 | E15.5 | E16 |
Rat | Days | 1 | 3.5 | 4-5 | 5 | 6 | 7.5 | 8.5 | 9 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 13.5 | 14 | 14.5 | 15 | 15.5 | 16 | 16.5 | 17 | 17.5 |
Note these Carnegie stages are only approximate day timings for average of embryos. Links: Carnegie Stage Comparison | ||||||||||||||||||||||||
|
Model Comparison
Postnatal Animal Models | mouse | rat | pig |
---|---|---|---|
Pregnancy period (days) | 18 – 21 | 21 – 23 | 110 – 118 |
Placenta type | Discoidal, decidual hemoendothelial choroidea |
Discoidal, decidual hemoendothelial choroidea |
Epitheliochorial |
Litter size | 6 – 12 | 6 – 15 | 11 – 16 |
Birth weight (g) | 0.5 – 1.5 | 3 – 5 | 900 – 1600 |
Weaning weight male/female (g) | 18 – 25/16 – 25 | 55 – 90/45 – 80 | 6000 – 8000 |
Suckling period (days) | 21–28 | 21 | 28–49 |
Solid diet beginning (days) | 10 | 12 | 12 – 15 |
Puberty male/female (week) | 4 – 6/5 | 6/6 – 8 | 20 – 28 |
Life expectancy (years) | 1 - 2 | 2 - 3 | 14 – 18 |
Table data - Otis and Brent (1954)[1] Links: timeline |
Animal
The collapsible table below shows a comparison of the prenatal period for a large number of animal species development.
Animal Development Time | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Animal Notes and Table Data Sources
|
Animal Development: axolotl | bat | cat | chicken | cow | dog | dolphin | echidna | fly | frog | goat | grasshopper | guinea pig | hamster | horse | kangaroo | koala | lizard | medaka | mouse | opossum | pig | platypus | rabbit | rat | salamander | sea squirt | sea urchin | sheep | worm | zebrafish | life cycles | development timetable | development models | K12 | ||
|
Human Systems
Neural
Early Neural Timeline | |
---|---|
Carnegie Stage | Event |
8 | (about 18 postovulatory days) neural groove and folds are first seen |
9 | three main divisions of the brain, which are not cerebral vesicles, can be distinguished while the neural groove is still completely open. |
10 | (two days later) neural folds begin to fuse near the junction between brain and spinal cord, when neural crest cells are arising mainly from the neural ectoderm |
11 | (about 24 days) the rostral (or cephalic) neuropore closes within a few hours; closure is bidirectional, it takes place from the dorsal and terminal lips and may occur in several areas simultaneously. The two lips, however, behave differently. |
12 | (about 26 days) The caudal neuropore takes a day to close. The level of final closure is approximately at future somitic pair 31 (corresponds to the level of sacral vertebra 2). Secondary neurulation begins, is the differentiation of the caudal part of the neural tube from the caudal eminence (or end-bud) without the intermediate phase of a neural plate. |
13 | (4 weeks) the neural tube is normally completely closed. |
Links: neural | Week 3 | Week 4 |
Respiratory
Respiratory Stages - Species Comparison - Stages Gestational age (days) | |||||
---|---|---|---|---|---|
Species | Term | Embryonic | Pseudoglandular | Canalicular | Saccular |
human | 280 | < 42 | 52 - 112 | 112 - 168 | 168 |
primate | 168 | < 42 | 57 - 80 | 80 - 140 | 140 |
sheep | 150 | < 40 | 40 - 80 | 80 - 120 | 120 |
rabbit | 32 | < 18 | 21 - 24 | 24 - 27 | 27 |
rat | 22 | < 13 | 16 - 19 | 19 - 20 | 21 |
mouse | 20 | < 9 | 16 | 18 | 19 |
Data modified from[2]
Links: respiratory | Respiratory Comparison | Mouse Human Respiratory | Mouse respiratory stages | mouse | rat | rabbit | Timeline Comparisons |
Placenta
Fertilization Age
(weeks) |
Gestational Age
(weeks) |
Vessel Lumen Diameter
(range in microns, µm) |
Features |
3 to 4 | 5 and 6 | 10 - 15 |
|
5 to 6 | 7 and 8 | 10 - 26 |
|
7 to 8 | 9 and 10 | 60 - 75 two central vessels
26 - 34 capillary network |
|
9 to 10 | 11 and 12 | 70 - 90 two central vessels
26 - 34 capillary network |
|
Vill development data based upon immunochemistry confocal laser scanning microscope (CLSM) study[3] with clinical gestational age (GA) from last menstrual period (LMP) and has been corrected for post-conception (fertilization) age, approximately 14 days later.
CD31 - (PECAM-1, Platelet Endothelial Cell Adhesion Molecule) is a cluster of differentiation molecule found on endothelial and other blood cells. |
Spleen
Feature | ||
---|---|---|
Carnegie stage 14 to 17
appears as a bulge in the dorsal mesogastrium. Mesothelium pseudostratified. | ||
Mesothelium (pseudostratified} replaced with high columnar cells and then low columnar cells. | ||
Basement membrane present after this stage. | ||
Hematopoietic cells detected. | ||
Spleen is now apparent. Mesenchymal cells differentiated from cells in dorsal mesogastrium. Sinus and hilus formation after this stage. | ||
Arteries and veins parallel entries at this stage. | ||
Human data.[4] Links: spleen | Kyoto Collection | Timeline human development |
References
- ↑ Otis EM and Brent R. Equivalent ages in mouse and human embryos. (1954) Anat Rec. 120(1):33-63. PMID 13207763
- ↑ Pinkerton KE & Joad JP. (2000). The mammalian respiratory system and critical windows of exposure for children's health. Environ. Health Perspect. , 108 Suppl 3, 457-62. PMID: 10852845
- ↑ Lisman BA, van den Hoff MJ, Boer K, Bleker OP, van Groningen K & Exalto N. (2007). The architecture of first trimester chorionic villous vascularization: a confocal laser scanning microscopical study. Hum. Reprod. , 22, 2254-60. PMID: 17545656 DOI.
- ↑ Endo A, Ueno S, Yamada S, Uwabe C & Takakuwa T. (2015). Morphogenesis of the spleen during the human embryonic period. Anat Rec (Hoboken) , 298, 820-6. PMID: 25403423 DOI.
Cite this page: Hill, M.A. (2024, April 24) Embryology Timeline Comparisons. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Timeline_Comparisons
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G