A(n) further develops the organs and systems that existed in rudimentary form in the embryonic stage.

The answer is Fetus.

Explanation:

Human embryonic development refers to the development and formation of the human embryo. A developing human is referred to as Embryo during 3-8 weeks, and Fetus the ninth month of gestation until the birth. At the end of the 8th week after fertilization- embryo is considered a fetus. During this stage, the following are markers during pregnancy:

•    By 12 weeks of pregnancy, The fetus is filled with the entire uterus.

•    By about 14 weeks,  sex can be identified a child.

•    By about 16 to 20 weeks, the pregnant woman can feel the fetus moving. Women who have been pregnant before feeling movements about 2 weeks earlier than women who are pregnant for the first time.

•    By about 24 weeks, The fetus has completely ready for survival outside the uterus.

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.