reproduction lab Flashcards

1
Q

Which human organ develops first?

A

the heart

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2
Q

which extraembryonic membrane becomes the placenta?

A

choreon

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3
Q

Why is the respiratory system not functional until the sixth month of later?

A

Placenta does job of lungs and it is not needed.

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4
Q

Oogensis:

A

Primary follicle and secondary follicle involved, produces a single egg.

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5
Q

Endoderm:

A

developments of epithelial lining of digestive tract and respiratory tract. Inner layer

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6
Q

Mesoderm:

A

Middle layer; developments of all systems. outer layers of digestive and respiratory systems.

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7
Q

Ectoderm:

A

outer layer. development of epidermis of skin. epithelial lining of oral cavity and rectum

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8
Q

Somites:

A

blocks of developing muscle tissue that differentiate from mesoderm

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9
Q

Third month events for mother and baby:

A

mother: uterus is size of grapefruit. baby: possible to distinguish sex, fingernails appear.

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10
Q

fourth month events for mother and baby:

A

mother: fetal movement is felt and heartbeat can be detected. baby: bony skeleton is visible and hair begins to appear

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11
Q

fifth month events for mother and baby:

A

mother: fetal movement is felt and uterus reaches up to level of umbilicus, pregnancy is noticebale. baby: Vernix caseosa begins to be deposited.

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12
Q

Sixth month events for mother and baby:

A

mother: breasts have enlarged and colostrum is produced. baby: covered with fine hair called languo and skin is wrinkled and reddish

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13
Q

seventh month events for mother and baby:

A

mother: uterus reaches halfway through umbilicus and ribcage. baby: testes descend into scrotum, eyes are opened

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14
Q

8th month events for mother and baby:

A

mother: standing and walking are difficult and weight gain is averaging about a pound a week. baby: body hair begins to disappear and fat begins to be deposited.

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15
Q

9th month events for mother and baby:

A

mother: Uterus is up to ribcage, sleeping becomes difficult. baby: baby is ready for birth.

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16
Q

Where are the testes located in human males and why?

A

the scrotum bc it protects and keeps the temp regulated

17
Q

What is the function of the vas deferens?

A

tp transport sperm

18
Q

what is the function of the prostate gland?

A

to nourish sperm

19
Q

Name the stage at which the embryo is a hollow ball of cells:

A

blastula

20
Q

What is the term for a solid ball of cells?

A

Mouilla

21
Q

What structure in the ovary contains the egg?

A

Vesicular follicle