Chapter 3.1 Overview of Embryology Flashcards Preview

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Flashcards in Chapter 3.1 Overview of Embryology Deck (14)
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1
Q

Embryology deals with the developmental events that occur during the

A

Prenatal period

2
Q

The prenatal period is the first

A

38 weeks of human development that begin with the fertilization of the secondary oocyte and end with birth

3
Q

The prenatal period is broken down into shorter periods

A
  • The pre-embryonic period
  • The embryonic period
  • The fetal
4
Q

The pre-embryonic period is

A

The first 2 weeks of development (the first 2 weeks after fertilization), when the single cell produced by fertilization (the zygote) becomes a spherical, multicellular structure (a blastocyst). This period ends when the blastocyst implants in the lining of the uterus

5
Q

The embryonic period includes

A

The third through eighth weeks of development. Time during which rudimentary versions of the major organ systems appear in the body, which is now called the embryo

6
Q

Includes the remaining 30 weeks of development prior to birth, when the organism level is called a fetus. During this period, the fetus continues to grow, and its organs increase in complexity

A

The fetal period

7
Q

The developmental processes that occur in the pre-embryonic and embryonic periods are known collectively as

A

Embryogenesis

8
Q

Embryogenesis and its stages are separated into

A

Cleavage, gastrulation, and organogenesis

9
Q

The zygote divides by mitosis to form a multicellular structure called a blastocyst

A

Cleavage

10
Q

The blastocyst cells form three primary germ layers, which are the basic cellular structures from which all body tissues develop

A

Gastrulation

11
Q

The three primary germ layers arrange themselves in ways that give rise to all organs in the body

A

Organogenesis

12
Q

Following birth, an individual spends a great portion of his or her life undergoing

A

Maturation

13
Q

During maturation the body grows and develops, and these organs become mature

A

Sex organs

14
Q

The sex organs (ovaries in the female, testes in the male) then begin to produce sex cells, or gametes through a process called

A

Gametogenesis