discirbe this and lebal it
embryonic folding
embryonic folding lateral longitudinal folding embryo diagram labels
- Cephalocaudal folding - head and tail folds form in the median plane.
- Lateral folding - the right and left sides move ventrally and fuse, closing most of the ventral body wall.
- Incorporation of yolk-sac endoderm - forms the primitive gut tube: foregut, midgut, and hindgut.
Labels for the model
| Label / structure | What it represents |
|---|---|
| Amnion | Outer membrane enclosing the embryo |
| Amniotic cavity | Fluid-filled space around the embryo |
| Embryo / embryonic body | Pink curved central developing body |
| Neural tube / developing brain | Dorsal blue structure, prominent in the head region |
| Somites | Small paired bead-like segments along the back of the embryo |
| Intraembryonic coelom | Developing body cavity, shown as spaces at the sides of the embryo |
| Extraembryonic coelom (chorionic cavity) | Space outside the embryo but within the surrounding membranes |
| Yolk sac / umbilical vesicle | Yellow sac below or outside the embryonic body |
| Primitive gut tube | Endoderm-lined tube incorporated into the embryo during folding |
| Foregut | Cranial portion of the primitive gut, formed by head folding |
| Midgut | Portion temporarily connected to the yolk sac |
| Hindgut | Caudal portion of the primitive gut, formed by tail folding |
| Connecting stalk | Attachment between embryo and chorion; contributes to the umbilical cord |
| Allantois | Small diverticulum extending into the connecting stalk |
| Primordial heart / pericardial region | Ventral structure that moves beneath the head during head folding |
| Head fold | Cranial bend caused mainly by rapid growth of the developing brain |
| Tail fold | Caudal bend that incorporates endoderm into the hindgut |
| Lateral body folds | Right and left folds that meet on the ventral surface |
What each type of section shows
- Side (sagittal) sections: show progression of head and tail folding and the embryo becoming C-shaped.
- Cross (transverse) sections: show lateral folding, closure of the ventral body wall, and formation of the gut tube.
- Later-stage sections: show a larger curved embryo with visible somites, primitive gut, yolk sac connection, and connecting stalk.
label with picture
~/
mkdir -p "/tmp/workspace/embryo-folding-label/output" && python - <<'PY' from PIL import Image, ImageDraw, ImageFont from pathlib import Path src=Path('/tmp/workspace/attachments/35da9749-81ad-4ea9-96b6-21ca20c54d27/1000214203.jpg') out=Path('/tmp/workspace/embryo-folding-label/output/embryo_folding_labelled.jpg') im=Image.open(src).convert('RGB') # Preserve original landscape model orientation. Extend left and bottom to prevent labels covering the model. W,H=im.size canvas=Image.new('RGB',(W+520,H+185),'white') canvas.paste(im,(0,0)) d=ImageDraw.Draw(canvas) try: font=ImageFont.truetype('/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf',25) small=ImageFont.truetype('/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf',20) title=ImageFont.truetype('/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf',31) except: font=small=title=ImageFont.load_default() # title in extension d.text((20,H+18),'Folding of Embryo (4th week): labelled model',fill=(20,20,20),font=title) d.text((20,H+62),'A-B: sagittal sections (head and tail folding) C-E: transverse sections (lateral folding)',fill=(45,45,45),font=small) # Numbered annotation markers. Coordinates correspond to the original unrotated photo. # Labels selected for elements clearly distinguishable in this particular teaching model. items=[ ((1100,135),'1','Amnion / amniotic cavity'), ((1060,210),'2','Embryo (head fold)'), ((1030,285),'3','Somites'), ((905,220),'4','Yolk sac'), ((785,280),'5','Connecting stalk'), ((625,210),'6','Neural tube / developing brain'), ((570,345),'7','Primitive gut tube'), ((385,230),'8','Intraembryonic coelom'), ((335,395),'9','Lateral body folds'), ((110,255),'10','Foregut'), ((88,425),'11','Hindgut'), ] # marker circles, leader lines to a numbered legend at right legend_x=W+35 start_y=38 for i,(pt,num,label) in enumerate(items): x,y=pt # circle r=17 d.ellipse((x-r,y-r,x+r,y+r), fill=(255,245,45), outline=(10,10,10), width=3) # numerals centred bbox=d.textbbox((0,0),num,font=font) tw,th=bbox[2]-bbox[0],bbox[3]-bbox[1] d.text((x-tw/2,y-th/2-3),num,fill=(0,0,0),font=font) ly=start_y+i*54 # leader from circle to legend d.line((x+r,y,legend_x-12,ly+15),fill=(42,85,150),width=2) d.ellipse((legend_x-6,ly+9,legend_x+6,ly+21),fill=(42,85,150)) d.text((legend_x+12,ly),f'{num}. {label}',fill=(15,15,15),font=font) # outline panels A-E in subtle red and add stage terms for box,txt in [((930,75,1270,360),'A'),((930,365,1270,680),'B'),((500,70,900,355),'C'),((490,365,900,680),'D'),((80,80,475,680),'E')]: d.rectangle(box,outline=(190,30,55),width=3) # save high quality canvas.save(out,quality=94) print(out) PY
embryo folding labelled
Image · JPG