He developing fetus reaches the age of viability weeks after conception, during the period.

The developing fetus reaches viability 26 weeks after conception during the embryonic development period.

Explanation:

Doctors use the term "fetal viability" to describe when vital organs such as the kidneys, lungs or heart are well enough formed to function with or without medical care, in which case the baby can be assured that has a chance of surviving outside the womb. This event usually occurs around 26 weeks of pregnancy during embryonic development, when the fetus could already be born. Otherwise, the birth would be too premature, or unviable, with no or very low probability of success.

hi there!

answer: b. nucleolus

explanation: nucleolus is a structure in the nucleus are ribosomes are made.

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-charlie

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i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .