CADE EXAM 1: PLACENTA (SOFT CHALK) QUESTIONS
& ANSWERS
placenta
a fetal-maternal organ that forms during pregnancy and serves the following functions:
--> acts as an organ of exchange : between maternal and fetal tissues, providing
nutrition, respiration, and excretion for the fetus (exchange of nutrients, gases and
waste products )
--> produces hormones: progesterone, hCG - human chorionic gonadotropin, human
placental lactogen = somatomammotropin
--> serves as an immunological barrier between maternal and fetal tissues.
human placenta is hemochordial meaning:
maternal blood comes in direct contact with the chorion (the outermost membrane
surrounding an embryo)
the placenta develops
as the endometrium of the uterus (decidua basalis - the endometrium located at the
implantation site) is invaded by the embryo's trophoblast which forms chorionic villi.
what are the components of the placenta
, -fetal components: villous chorion (chorionic villi)
-maternal component: decidua basalis (endometrium located at the implantation site)
microscopic aspect of the placenta
at term, the placenta is usually a discoid shaped structure measuring approximately 20
cm in diameter and 2.5 cm in thickness
fetal component
the fetus surface of the placenta is characterized by:
--> vascular chorionic plate covered by amnion giving it a smooth, shiny grayish
appearance
umbilical cord
is attached with 2 umbilical arteries and 1 umbilical vein surrounded by mucous
connective tissue (Wharton's jelly)
Umbilical vessels
are longer than the umbilical cord, so they commonly twist around each other and
sometimes bend, forming loops known as false knots
maternal component
& ANSWERS
placenta
a fetal-maternal organ that forms during pregnancy and serves the following functions:
--> acts as an organ of exchange : between maternal and fetal tissues, providing
nutrition, respiration, and excretion for the fetus (exchange of nutrients, gases and
waste products )
--> produces hormones: progesterone, hCG - human chorionic gonadotropin, human
placental lactogen = somatomammotropin
--> serves as an immunological barrier between maternal and fetal tissues.
human placenta is hemochordial meaning:
maternal blood comes in direct contact with the chorion (the outermost membrane
surrounding an embryo)
the placenta develops
as the endometrium of the uterus (decidua basalis - the endometrium located at the
implantation site) is invaded by the embryo's trophoblast which forms chorionic villi.
what are the components of the placenta
, -fetal components: villous chorion (chorionic villi)
-maternal component: decidua basalis (endometrium located at the implantation site)
microscopic aspect of the placenta
at term, the placenta is usually a discoid shaped structure measuring approximately 20
cm in diameter and 2.5 cm in thickness
fetal component
the fetus surface of the placenta is characterized by:
--> vascular chorionic plate covered by amnion giving it a smooth, shiny grayish
appearance
umbilical cord
is attached with 2 umbilical arteries and 1 umbilical vein surrounded by mucous
connective tissue (Wharton's jelly)
Umbilical vessels
are longer than the umbilical cord, so they commonly twist around each other and
sometimes bend, forming loops known as false knots
maternal component
