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Science 7th grade > Reproduction System > Flashcards

Reproduction System Flashcards

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1
Q

7th Grade Reproduction

Reproduction is essential to what?

A

the survival of the species

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2
Q

7th Grade Reproduction

What is reproduction NOT essential to?

A

the survival of the individual

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3
Q

7th Grade Reproduction

What is reproduction?

A

the process through which living things produce new individuals of the same kind

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4
Q

7th Grade Reproduction

What kind of specialized cells does the reproductive system produce, store, nourish, and release?

A

sex cells

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5
Q

7th Grade Reproduction

sperm

A

male sex cell

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6
Q

7th Grade Reproduction

egg (ovum)

A

female sex cell

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7
Q

7th Grade Reproduction

fertilization

A

when the sperm and egg unite

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8
Q

7th Grade Reproduction

Where are chromosomes located?

A

in each cell of the body

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9
Q

7th Grade Reproduction

How many chromosomes do normal cells contain?

A

46

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10
Q

7th Grade Reproduction

How many chromosomes do sex cells contain?

A

23

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11
Q

7th Grade Reproduction

zygote

A

a fertilized egg that contains 46 chromosomes

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12
Q

7th Grade Reproduction

What is produced after fertilization that causes development of specific reproductive organs?

A

hormones

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13
Q

7th Grade Reproduction

testes

A

male reproductive organ

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14
Q

7th Grade Reproduction

Where are the testes located?

A

in the scrotum

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15
Q

7th Grade Reproduction

What is the role of the testes?

A

they produce sperm

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16
Q

7th Grade Reproduction

Why is it important that the testes are not located within the body cavity?

A

sperm cannot be produced and are destroyed at 98.6 degrees (normal body temperature)

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17
Q

7th Grade Reproduction

Where does sperm travel after it is produced?

A

through the vas deferens

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18
Q

7th Grade Reproduction

What is mixed with sperm in the vas deferens?

A

semen

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19
Q

7th Grade Reproduction

urethra

A

the duel purpose tube through which sperm (mixed with semen) travel

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20
Q

7th Grade Reproduction

penis

A

where the sperm exits the body

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21
Q

7th Grade Reproduction

testosterone

A

the male hormone that is produced in the testes

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22
Q

7th Grade Reproduction

What is the hormone testosterone responsible for?

A

facial and body hair, broadening the chest, a deeper voice

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23
Q

7th Grade Reproduction

ovaries

A

the female reproductive organ

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24
Q

7th Grade Reproduction

Where are the ovaries located?

A

at the hip level, one on each side

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25
Q

7th Grade Reproduction

What is the role of the ovaries?

A

they produce an egg (ova)

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26
Q

7th Grade Reproduction

Where are all female reproductive parts located?

A

WITHIN the female body

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27
Q

7th Grade Reproduction

What releases the egg?

A

ovaries

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28
Q

7th Grade Reproduction

Once the egg is released from the ovaries, where does it go?

A

the fallopian tubes (oviduct)

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29
Q

7th Grade Reproduction

After leaving the fallopian tubes, where does the egg go?

A

uterus (womb)

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30
Q

7th Grade Reproduction

Where does a fertilized egg develop?

A

in the uterus

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31
Q

7th Grade Reproduction

cervix

A

an opening at the mouth of the uterus

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32
Q

7th Grade Reproduction

vagina

A

birth canal

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33
Q

7th Grade Reproduction

What is the path that the egg travels?

A

fallopian tubes-uterus-cervix-vagina

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34
Q

7th Grade Reproduction

What is the path that the sperm travels?

A

testes-vas deferens-urethra-penis

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35
Q

7th Grade Reproduction

estrogen

A

a female hormone produced in the ovaries

36
Q

7th Grade Reproduction

What is the job of estrogen?

A

it is responsible for broadening the hips, enlarging the breasts, and the maturation and release of eggs

37
Q

7th Grade Reproduction

About how often does a menstrual cycle occur?

A

monthly

38
Q

7th Grade Reproduction

About how long does a menstrual cycle last?

A

28 days

39
Q

7th Grade Reproduction

What is the purpose of the menstrual cycle?

A

to prepare the uterus for a fertilized egg

40
Q

7th Grade Reproduction

What occurs during days 1-4 of the cycle?

A

menstrual discharge

41
Q

7th Grade Reproduction

What occurs during days 5-13 of the cycle?

A

egg matures inside the ovary

42
Q

7th Grade Reproduction

What occurs during days 14-15 of the cycle?

A

ovulation

43
Q

7th Grade Reproduction

ovulation

A

when the egg is released from the ovary

44
Q

7th Grade Reproduction

What occurs during days 16-22 of the cycle?

A

the egg travels through the fallopian tube toward the uterus

45
Q

7th Grade Reproduction

What occurs during days 23-28 of the cycle?

A
  1. fertilized egg imbeds in the side of the uterus OR 2. unfertilized egg is released through mensturation
46
Q

7th Grade Reproduction

When is the only time an egg can be fertilized?

A

during ovulation

47
Q

7th Grade Reproduction

When does ovulation occur?

A

about 14 days after the start of menstruation

48
Q

7th Grade Reproduction

A baby is born about how many months after fertilization?

A

9

49
Q

7th Grade Reproduction

What is the first step in development before birth?

A

zygote (fertilized egg with 46 chromosomes)

50
Q

7th Grade Reproduction

embryo

A

1st-8th week of development before birth

51
Q

7th Grade Reproduction

amniotic sac

A

fluid-filled sack that cushions and products baby throughout development

52
Q

7th Grade Reproduction

placenta

A

connects baby to mother and provides nourishment, respiration, and excretion

53
Q

7th Grade Reproduction

From what is a placenta formed?

A

it develops from embryonic tissue and tissue from the uterus

54
Q

7th Grade Reproduction

fetus

A

a baby from the 8th week until it is born

55
Q

7th Grade Reproduction

What occurs during a baby’s 1-3 months of development?

A

all internal organs develop, eye patches form

56
Q

7th Grade Reproduction

What occurs during a baby’s 4-6 months of development?

A

skeleton forms, heartbeat can be heart with a stethoscope, weight is about 1.5 pounds

57
Q

7th Grade Reproduction

What occurs during a baby’s 7-9 months of development?

A

lungs mature; body increases 4 times in size

58
Q

7th Grade Reproduction

umbilical cord

A

connects fetus to the placenta…has 2 arteries and 1 vein

59
Q

7th Grade Reproduction

amniocentesis

A

a test where a small amount of amniotic fluid is removed with a needle and is used to test a child’s genetic make-up

60
Q

7th Grade Reproduction

What occurs during labor?

A

strong muscular contractions begin…baby is pushed through the cervix at 10 cm

61
Q

7th Grade Reproduction

About how long can labor last?

A

2-20 hours

62
Q

7th Grade Reproduction

During the delivery, what part of the baby generally comes out first

A

head

63
Q

7th Grade Reproduction

How long can delivery last?

A

from several minutes to several hours

64
Q

7th Grade Reproduction

Why does a baby cry when it is first born?

A

to expand its lungs

65
Q

7th Grade Reproduction

What happens during the 3rd stage of birth?

A

the placenta is delivered

66
Q

7th Grade Reproduction

How long does infancy occur?

A

from about 1 month-2 years

67
Q

7th Grade Reproduction

How big is a baby’s head during infancy?

A

about 1/4 the size of its body

68
Q

7th Grade Reproduction

At what age can a baby generally hold up its head?

A

3 months

69
Q

7th Grade Reproduction

At what age can a baby generally begin to crawl?

A

5 months

70
Q

7th Grade Reproduction

At what age can a baby generally grasp objects?

A

7 months

71
Q

7th Grade Reproduction

At what age can a baby generally walk

A

10-12 months

72
Q

7th Grade Reproduction

How long does childhood last?

A

from 2-13 years

73
Q

7th Grade Reproduction

What develops for a child during childhood?

A

mental ability increases, memory strengthens, muscular development, language skills, social appropriate behavior

74
Q

7th Grade Reproduction

When does adolescence occur?

A

at about 13 years old

75
Q

7th Grade Reproduction

What is adolescence?

A

the passage from childhood to adulthood

76
Q

7th Grade Reproduction

What does adolescence mean in Latin?

A

to grow up

77
Q

7th Grade Reproduction

puberty

A

when sexual organs begin to develop

78
Q

7th Grade Reproduction

What occurs during puberty to girls?

A

menstruation begins

79
Q

7th Grade Reproduction

What occurs during puberty to boys?

A

sperm is produced

80
Q

7th Grade Reproduction

How much do girls grow during a typical growth spurt between ages 10-16

A

6 inches, 35 pounds

81
Q

7th Grade Reproduction

How much do boys grow during a typical growth spurt between ages 11-17

A

8 inches, 44 pounds

82
Q

7th Grade Reproduction

When does adulthood begin?

A

around age 20

83
Q

7th Grade Reproduction

adulthood

A

when all systems are fully developed

84
Q

7th Grade Reproduction

How does a person’s body develop during adulthood?

A

fat moves farther away from the skin, face has more definition

85
Q

7th Grade Reproduction

When does aging start on a body?

A

around age 30

86
Q

7th Grade Reproduction

What happens to a body during aging?

A

skin looses elasticity, eyes lose ability to focus, hair loses color, muscular strength decreases

87
Q

7th Grade Reproduction

menopause

A

females stop menstruation and ovulation

Science 7th grade (8 decks)

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