Prenatal Development Stages Quiz

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Questions and Answers

What is the shortest stage of prenatal development?

Fetal Stage
Germinal Stage (correct)
Implantation Stage
Embryonic Stage

At what point is the organism referred to as a fetus?

When it is a blastocyst
After the embryonic stage (correct)
During the implantation process
At fertilization

What is characterized by rapid development and organ differentiation?

Embryonic Stage
Fetal Stage (correct)
Germinal Stage
Postnatal Stage

Which of the following is NOT a teratogen?

Stress (B) Signup and view all the answers

Which layer of cells forms the outermost layer during embryonic development?

Ectoderm (B) Signup and view all the answers

What major development occurs during the second trimester of the fetal stage?

Fetal movement is felt (A) Signup and view all the answers

During which prenatal stage does the organism begin to establish basic anatomy?

Embryonic Stage (C) Signup and view all the answers

Which statement about body proportions during the fetal stage is accurate?

The head represents about a quarter of total size at birth. (D) Signup and view all the answers

Flashcards

Germinal Stage

The shortest stage of prenatal development.

Fetus

The stage after the embryonic stage of prenatal development.

Fetal Stage

The period marked by rapid growth and specialization of organs.

Ectoderm

Exterior layer that develops into skin and nervous system.

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Second Trimester

Fetal movement is felt by the mother.

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Embryonic Stage

Basic body structures and organ systems begin to form.

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Fetal Proportions

At birth, the head represents about a quarter of the baby's total size.

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Study Notes

Prenatal Development Stages

The shortest stage of prenatal development is the germinal stage.
The organism is referred to as a fetus from the ninth week of gestation onwards.
The embryonic stage is characterized by rapid development and organ differentiation.
The embryonic stage sees the differentiation of the three germ layers - ectoderm, mesoderm, and endoderm.
The ectoderm forms the outermost layer during embryonic development. It will give rise to skin, nervous system, and sensory organs.
The second trimester of the fetal stage sees significant growth in size and weight, as well as the development of sensory organs.
The embryonic stage is when the organism begins to establish basic anatomy.
During the fetal stage, the head is proportionally larger than the body.

Teratogens

A teratogen is any substance that can cause defects in a developing embryo or fetus.
Examples of teratogens include alcohol, smoking, certain medications, and some infections.