Term
| Week 3 the embryo becomes... |
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Definition
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Term
| What is formed at the start of gastrulation? |
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Definition
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Term
| What condition is the right/left side of body reversed |
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Definition
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Term
| How is partial situs inversus more serious |
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Definition
| Abnormal connections made with blood vessels delivering oxygenated blood to the wrong parts |
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Term
| What is beginning to form when epiblast cells move towards the primitive streak |
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Definition
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Term
| Cells detach from the epiblast and do what? |
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Definition
| Insert into the hypoblast to replace hypoblast cells |
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Term
| When is the definitive endoderm formation completed |
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Definition
| When the hypoblast cells have been completely replaced |
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Term
| What is formed when epiblast cells move down through the primitive streak to form a middle layer |
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Definition
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Term
| What happens to the mesoderm once formed |
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Definition
| It becomes highly organised into blobs |
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Term
| What are the different mesoderm blobs |
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Definition
Notochord
Paraxial mesoderm
Intermediate mesoderm
Lateral mesoderm |
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Term
| How is the ectoderm formed |
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Definition
| The remaining epiblast becomes the ectoderm and completes gastrulation |
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Term
| What does the ectoderm eventually form |
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Definition
| The epidermis and nervous system |
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Term
| What does the mesoderm eventually form? |
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Definition
| Skeleton and skeletal muscles |
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Term
| What does the endoderm eventually form? |
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Definition
| The epithelial layer of the gastrointestinal tract |
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Term
| What can abnormal gastrulation lead to? |
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Definition
| Sirenomelia (mermain syndrome) |
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Term
| What is the most common tumour in newborns? |
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Definition
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Term
| What gives rise to sacrococcygeal teratoma? |
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Definition
| Remnants of the primitive streak |
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Term
| What does the notochord initiate? |
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Definition
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Term
| What do signals from the notochord cause? |
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Definition
| The overlying ectoderm to thicken and form the neural plate |
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Term
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Definition
| When the notochord causes the overlying ectorderm to thicken and form the neural plate |
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Term
| What initiates and organises the formation of vertebrae |
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Definition
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Term
| What are vertebrae formed from |
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Definition
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Term
| What do somites differentiate into |
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Definition
Sclerotome
Myotome
Dermatome |
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Term
| Which layer do somites form from? |
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Definition
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Term
| Sclerotome cells surround the notochord to form what? |
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Definition
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Term
| What do sclerotome cells from when they surround the neural tube |
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Definition
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Term
| What does abnormal induction of sclerotomes result in |
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Definition
Spina bifida
Meningocele
Myelomeningocele |
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