The amnion is a vital membrane that surrounds the embryo or fetus in the womb of a pregnant woman. It plays a crucial role in protecting the developing fetus and providing it with the necessary nutrients and oxygen. In this article, we will explore the definition, origin, meaning, associations, synonyms, antonyms, and example sentences of amnion.
Definitions
Amnion is defined as the innermost membrane that encloses the embryo of a mammal, bird, or reptile. It is a thin, transparent sac filled with amniotic fluid that protects the fetus from mechanical shocks and temperature changes.
Origin
The word amnion is derived from the Greek word amnos, which means lamb. This is because the amniotic fluid that surrounds the fetus is similar in appearance to the water that surrounds a lamb in the womb.
Meaning in different dictionaries
According to the Merriam-Webster dictionary, amnion is defined as “the innermost of the extraembryonic membranes that encloses the embryo in a fluid-filled cavity, is composed of an outer layer of ectodermal cells and an inner layer of mesodermal cells, and contributes to the formation of the umbilical cord.”
The Oxford English Dictionary defines amnion as “the innermost of the fetal membranes, forming a sac containing the embryo and amniotic fluid.”
Associations
The amnion is associated with the development of the fetus and the protection of the unborn child from external factors. It is also associated with the formation of the umbilical cord, which connects the fetus to the placenta and provides it with nutrients and oxygen.
Synonyms
Some synonyms of amnion include fetal membrane, embryonic sac, and amniotic sac.
Antonyms
There are no direct antonyms for amnion, as it is a unique and specific term related to fetal development.
The same root words
The same root words as amnion include amniotic, amnioscope, and amniocentesis.
Example Sentences
- The amnion is a vital membrane that protects the fetus from external factors.
- The amniotic fluid that fills the amnion provides nutrients and oxygen to the developing fetus.
- During an amniocentesis, a small amount of amniotic fluid is removed from the amnion for testing.
- The amnioscope is a tool used to examine the amniotic sac during pregnancy.
- The umbilical cord connects the fetus to the placenta through the amnion.