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Hru study guide
hru study guide
39
Science
7th Grade
04/08/2010

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Term
Abstinence
Definition
refraining from sexual contact until marriage
Term
puberty
Definition
the stage in life when the body changes from  a chilt to an adult
Term
menstruation
Definition
discharge of the blood filled lining of the uterus
Term
ovlulation
Definition
the process in which a mature egg is realeased from the ovary
Term
fertilization
Definition
the joining of the sperm cell and the ovum
Term
menopause
Definition
when ovulation stops
Term
zygote
Definition
a fertilized egg
Term
embryo
Definition
when the zygote reaches the uterus
Term
fetus
Definition
the stage of development from the 8 week to birth
Term
placenta
Definition
a membrane that because a link btw a baby and a mom
Term
umbilical cord
Definition
a ropelike struction that forms in uterus between the embryo and the placenta
Term
std
Definition
sexual transmitted dieseas
Term
at what age do males usually begin puberty
Definition
11-13
Term
at what age do females usually begin puberty
Definition
9-12
Term

females-

at what age does a females usually begin her 1st menstrual cycle

Definition
11-13
Term
how long does the menstrual period last
Definition
28 days
Term
what are the tree glands which produce semen
Definition
prostate, cowpers, semical vesical
Term
what is the male sex hormone
Definition
testorone
Term
what does the male sex hormone control
Definition
controls secondary sexual characteristics
Term
what is the female sex hormone
Definition
estrogen, progesterone
Term
what does the female sex hormone control
Definition
controls secondary sexual characteristics
Term
the sperm are stored in a structrue called the
Definition
testes
Term
what is the most common std in the us
Definition
chlamydia
Term
what are some common std
Definition
aids , gonoria, herpes
Term
what type of blood cells are attacked by the virus that caused AIDS
Definition
T cells
Term
what are the days of highest fertilization?
Definition
14-16
Term
where does fertilization occur
Definition
fallopian tube
Term
what is the failure rate for using the birth control pill
Definition
5%
Term
how can std be spread
Definition
oral contact
Term
how can stds not be spread
Definition
through air
Term
which is the shortes human life cycle, the longest?
Definition
zygote, fetus
Term
what is the main characteristic of puberty in both male and female
Definition
the ability to be an adult
Term
what is the function of the testes in the male
Definition
produces male sex hormones
Term
between the uterus and the vagina is the
Definition
cervix
Term
in the uterus, the embryou is connected to the placenta by the
Definition
umbilical cord
Term
fallopian tubes are also known as
Definition
oviducts
Term
vagina is also referred as
Definition
birth canal
Term
what cell process is used to create the zygote stage of fetal development
Definition
fertilization
Term
a boy and girl twin can only happen in which of the two types of twins
Definition
faternal
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