Define the following concepts related to conception, development of the embryo, and fetus:
E. Embryonic membrane
Conception and Development
In sexually reproducing animals two gametes will join to form a zygote that will result in pregnancy. In humans, the average gestation period is nine months which is divided into trimesters.
Answer and Explanation:
A. Embryo - in human pregnancy, the embryo is a period that occurs shortly after implantation. This is when the generation of human tissue begins.
B. Fetus - in humans, a fetus is the stage that occurs after the embryonic stage. In humans, this is generally defined as the 9th week after fertilization.
C. Amnio - in medicine, the term amnio is a shortened version of the word amniocentesis. This is a procedure used for prenatal screening in which amniotic fluid is obtained with a needle and sent for various tests.
D. Gametogenesis - is sexually reproducing animals, this is a process in which sex cells named gametes are generated via meiosis.
E. Embryonic membrane - this is typically referred to as the extraemryotic membranes. There are four which include the amnio, chorion, yolk and allantois.
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from Biology 101: Intro to BiologyChapter 12 / Lesson 9