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PART 2: Fetal vs Neonatal Lung – Structure, Function and Development Thi s is...
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PART 2: Fetal vs Neonatal Lung – Structure, Function and Development
This is a slide of the fetal rat. Using this designated fetal slide below, and the neonatal lung virtual slide from PART 1, create a one-page annotated comparison of the two lungs at the different developmental stages.
What you need to do
Using no more than 4 images in total:
- Select and label
key morphological features visible in both the fetal and neonatal lung. Use different magnifications where useful.
- Compare the two lungs
– clearly identify the major differences you can see between the fetal and neonatal specimens using descriptive labels where appropriate.
- Explain what the differences mean using descriptive labels– link the morphology you observe to function, particularly the change from a fluid-filled fetal lung to an air-breathing neonatal lung
.
- Link your observations to lung development using relevant concepts from the Lung Development lecture
.
- Estimate the developmental stage of the fetal lung as if it were a human specimen. Give a brief justification based on the histological features you can see
.
Although the designated fetal specimen is from rat and the neonatal specimen is from human, for the purposes of this assessment assume that the specimens represent the same species. Do not use species differences to explain your observations. Focus only on developmental differences that can be supported by the histological features visible in the slides.
This task allows some flexibility in how you choose to present and annotate your comparison. Where you use references or other sources, including the Lung Development lecture notes, these should be appropriately acknowledged within your one-page submission.
Submission requirements
Maximum
4 images, taken only from the designated virtual slidesMaximum
1 A4 pageMinimum
12-point fontUse
labels and short annotationsdirectly on/alongside your images
Submit as a
PDF
Keep the focus on what you can SEE in the slides. You are being assessed on your ability to identify, compare and interpret the morphology, not on providing a general description of lung development.
Criterion
|
Excellent
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Good
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Developing
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Limited / Not demonstrated
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Marks
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Selection & labelling of morphological features
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Images are well selected across appropriate magnifications. Key features in both fetal and neonatal lung are accurately identified and clearly labelled.
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Appropriate images and most key features are correctly identified and labelled; minor omissions/errors.
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Some relevant features identified, but important structures are missing, unclear or incorrectly labelled.
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Few relevant features identified and/or substantial inaccuracies.
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/4
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Comparison of fetal vs neonatal morphology
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Makes clear, direct comparisons between the specimens, identifying the major morphological differences visible in the slides.
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Identifies several relevant differences, with generally effective comparison between specimens.
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Describes both specimens but comparison is limited or largely separate rather than direct.
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Minimal comparison or observations are largely generic/not supported by the slides.
|
/4
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Structure–function interpretation
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Clearly explains (using descriptive labels) why the observed morphology differs, linking specific features to fetal versus neonatal lung from a fluid-filled to air-breathing lung.
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Appropriate structure–function links with mostly clear explanations.
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Some structure–function links, but explanations are superficial or not consistently tied to visible morphology.
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Limited or inaccurate understanding of the functional significance of the observed differences.
|
/4
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Application of lung development concepts
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Effectively applies relevant concepts from the Lung Development lecture to interpret specific features observed in the specimens.
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Appropriate developmental concepts applied, with some connection to observed morphology.
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Some relevant developmental knowledge included, but largely descriptive or weakly connected to the specimens.
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Little relevant application of developmental concepts and/or predominantly generic information.
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/4
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Fetal developmental stage & justification
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Provides a plausible human developmental stage, justified using multiple specific morphological features visible in the images.
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Plausible stage with appropriate morphological justification.
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Stage suggested but justification is limited, vague or only partly supported by the specimen.
|
Stage is unsupported/inaccurate or not attempted.
|
/4
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Presentation & requirements
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Clear, concise and visually effective use of images and descriptive labels. Meets all requirements: ≤4 images, ≤1 A4 page, ≥12-point font, PDF.
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Generally clear presentation with minor issues.
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Presentation makes interpretation difficult and/or requirements are not fully followed.
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Poorly organised or substantial requirements not followed.
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/4
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TOTAL
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/24
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