velamentous insertion

(redirected from parasol insertion)

insertion

 [in-ser´shun]
1. the act of implanting, or condition of being implanted.
2. the site of attachment, as of a muscle to the bone that it moves.
3. in genetics, a rare nonreciprocal type of translocation in which a segment is removed from one chromosome and then inserted into a broken region of a nonhomologous chromosome.
airway insertion and stabilization in the nursing interventions classification, a nursing intervention defined as insertion or assisting with insertion and stabilization of an artificial airway. See also artificial airway management.
intravenous (IV) insertion in the nursing interventions classification, a nursing intervention defined as insertion of a needle into a peripheral vein for the purpose of intravenous infusion of fluids, blood, or medications.
thought insertion the delusion that thoughts that are not one's own are being inserted into one's mind.
velamentous insertion attachment of the umbilical cord to the edge of the placenta.

vel·a·men·tous in·ser·tion

a form of insertion of the fetal blood vessels into the placenta, in which the vessels separate before reaching the placenta and develop toward it in a fold of amnion, somewhat like the ribs of an open parasol.
Synonym(s): parasol insertion

velamentous insertion

The attachment of the umbilical cord to the edge of the placenta.
See also: insertion

insertion

1. the act of implanting, or condition of being implanted.
2. the site of attachment, as of a muscle to the bone that it moves.

insertion sequence (IS)
see transposable genetic elements.
velamentous insertion
attachment to a membrane, such as the umbilical cord to the fetal membranes.