Talk:Paper - Histochemical horizons in human embryos - Stage 13
EPIDERMIS (cells)
A. B.
General (thin) Limb buds and pharyngeal region (thick)
(1. Basement nienibrune CoNNEc'r1vE TISSUE
A.
B.
Notochord
Cells
Basement membrane Mesoblast (Limb buds)
(J. Mesenehyme
Villi
Body stalk and ventral body Wall
Root of mesentery Mesonephrie ridge Pharynx
Surrounding eye and ear Macrophages
Somites
Dermatome
Myotome
Selerotome
NERVOUS SYSTEM
A.
data
F. G.
Brain
Ventral portion Dorsal portion Spinal cord
Ventral portion Dorsal portion Ganglia
Nerves
Eye
Lens
Retina (Optic evagination) Otie vesicle Sympathetic ganglia (Myenteric plexi)
H. Limiting membrane surround ing central nervous system,
0‘ L YCOGEN
Five Millimeter Embryo
FETUS NO. 5
GLYC()PROTEIN
RIBO—
NUCLEOPROTEIN
ALPHA NAPHTHYI4 ALKALINE PHOS PHATAS E
ALKALINE NAPHTHYL
GLYCERO
PHOS PHATASE
ALPHA
ACID PHOSPHATASE
5-NUCLEOTIDASE
NONSPECIFIC ESTERASE
l+| + +++++l +I+
+ +l+ + +++++I +++ ++ +++I +++
pH 9.4
+ ++
III I
++++rI I+l
1+
I+++ I++
pH 9.0
+ ++
I{+ + +++++l 1+!
++ ++++ +++ I
pH 5.0
+ +
+1
+!+I Ill
pH 7.5
pH 7.8
+1
1l++ II} +
H8
A. rnarynx Epithelium Basement membrane
B Thyroid and thyroglossal duet
C. Lung (epithelium)
D. Gut epithelium Basement membrane Liver cells
Dorsal (eoelomie mesoblast)
Ventral Sinus endothelium Kupifer cells
Capsule (coelomic epithelium) E. Dorsal pancreas and gall bladder
BLOOD VASCULAR SYSTEM A. Heart Muscle Auricle Ventriele Endothelium Auricle Ventricle Myoendoeartlial gelatinous cushion B. Vessels Aorta. Small arteries (Capillary size) Umbilical arteries Cardinal veins Umbilical vein Venous plexi (Limb buds, lateral pharynx, yolk sac) GERm,CELLs BIESONEPHROS Tubules Mesonepl1rie duet CoI<:Lo:\I1e EPITHELIUM
Gut
Parietal
Pleural
Hepatic
Mesonephric
YOLK SAC Endoderm Endothelium CHORION
Syneitial trophoblast
Cytotrophoblast
Connective tissue
Capillaries of stroma
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++l +++|+
Not foun
\/
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+I+l+9 ll
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