Summary
Three types of wall structure of blood vessels have been described. It consists of the following distinct layers, from exterior to interior: 1. “peritoneal” cells — thin basal lamina — some endothelial cells; 2. myoepithelial cells resting on a basal lamina — some endothelial cells; 3. circular and longitudinal muscle layers of myoepithelial cells — thick basal lamina — continuous endothelial lining.
Resume
Trois types de parois ont été décrits dans l'appareil circulatoire du tronc dePhoronis psammophila. La succession des diverses couches de chaque type est la suivante: 1. cellules “péritonéales” — lame basale — rares cellules endothéliales; 2. cellules myoépithéliales — lame basale — rares cellules endothéliales; 3. une couche de muscles circukires, puis une de muscles longitudinaux — épaisse lame basale — endothélium continu.
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Abbreviations
- C:
-
capillaire
- ce:
-
cavité coelomique
- ce:
-
cellule endothéliale
- cm:
-
cellule myoépithé'liale
- cp:
-
cellule péritonéale
- fc:
-
fibre musculaire circulaire
- fl:
-
fibre musculaire longitudinale
- gs:
-
globule sanguin
- lb:
-
lame basale
- m:
-
myofibrille
- mf:
-
myofilament
- tvp:
-
tissu vasopéritonéal
- V:
-
vaisseau sanguin
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Emig, C.C. Sur la structure des parois de l'appareil circulatoire dePhoronis psammophila Cori (Phoronida, Lophophorata). Zoomorphologie 87, 147–153 (1977). https://doi.org/10.1007/BF01007603
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DOI: https://doi.org/10.1007/BF01007603