Child Development Prenatal Development

3rd

1/4 inch in length at the bginning of the _____ week of development

roles

The _____ of the umbilical cord is to : bring nutrients, bring oxygen, take away wates

false because if you are a premature baby then you had a lower amount of weeks in your mother

True or false: Each person's prenatal development will be the exact amount of time.

brown

____ fat- can turn directly into energy to keep baby warm

white

____ fat-also as an insulation to keep the baby warm

period

____ of the fetus

muscle

_____ fibers begin to grow

38-40

_____ weeks prenatal development will come to an end. the child is now ready to be born

fingerprints

______ are in place

webbed

______ feet and hands

neural

_______ tube connects brain to spinal cord closes

200-500 million

_______________ of sperm are released every time a man ejaculates sperm

varnix caseosa

a slick coat of a white fatty subbtance that protects the skin from amniotic fluid and eases delivery of the baby

period

aas the ______ of the fetyus begins all organs are in place and beginning to function

organs

all of the major _________ systems of the body begin the develop

millions

along came ________ of sperm

3-8

an embryo is a developing cluster of cells in the uterus during about the _______ weeks of preganancy

teeth

and palate begin to form

12 1/2

average age of male puberty

hiccup

babies ________ soudless

breathing

baby makes ____ movements- is breathing in amniotic fluid

genetials

begin to form

brain

begins to develop

liver

begins to make bile

prenatal development

begins with conception

harden

bones begin to _____

birth

by ____ will have 1 million ovum

25

by the ____th day after comception the heart has begun to beat

umbilical cord

by the end of the embryonic stage the placenta, _________, amniotic sac and the amniotic fluid have developed

pinhead

by the end of the period of the zygote, the zygote is the size of a...

nerve

by week 3 ______ growth begins

veins

can see _____ though skin. you can see the veins because the body has not yet put down a layer of fat under the skin

period of the zygote

conception begins in the....

fingernails

develops this

1/2

end of the 5th week- _____ inch long

fused

eyelids are ______ they open later in prenatal development

week 25

eyes begin to open

iris

eyes developed but ______ lacks pigmentation

myelin

fat that covers nerve cells

6 million

females have _____ eggs in ovaries during prenatal development

grasp

fetus can _____, squit, frown, grimace, and suck her thumb

reflexes

fetus has _____

zygote

first stage-period of the ___________

face

hands feet and ______ develop

week 22

has fingernails

heart

has left and right chamber

150

heart beats _____ beats per minute

beat

heart begins to ________

first stage

in the _________, the zygote (fertilized egg) is created

support structures

incluyde the placenta umbilical cprd and the amniotic sac and fluid

head

is 1/2 the size of the entire body

blastocyst

is a highly differentiaated highly developed zygote that has grown to the point where it ii ready to attach into the uterine weall (implantation)

placenta

is and organ that develops only to support the growth of a new child. after the child is born the placenta is delieverd and when a woman has another child that child will develop his or her own placenta

larynx

is developing you will use this after birth make sounnds

blasocyst

is formed when zygote is complete

fat

is important

ten

it takes about ____ weeks for sperm cells to mature

tadpole

looks like a ______

surfactant

lungs develop ____-a substance that allows the lungs to expand more easily

survive

main job of fetus to grow large enough to ____ on his.her own

week 28

male children-testicles move from abdomen to the scrotum

puberty

mens bodies begin making sperm when they reach...

36 weeks

most of the lanugo and vernix have disappeared baby has been swallowing the lanugo and vernix and will execrete this is the first bowel movement known as meconium

fatty covering

myelin- _____ ______ of the nerve cells, helps signals travel faster and further, to and from the brain

synapses

nerve ____ begin to form, connections between nerve cells

lightening

occure- baby drops into a pelvis mother feels the child is lighter because its no longer pushing on the mothers lungs so she is able to breath easier

miscarriage

odds of a _____ drop after 12 weeks

physical characteristics

of amniotic fluid is amount smell salty clear

9th month

of prenatal development the child develops antibodies to help fight infection

fallopian tube

once upon a time a lonely egg lay in the folds of the...

continue

organs____ to mature

female reproductive cell

ovum

ovaries

ovum are produced in the...

lanugo

peach fuzz hair begins to cover body

two

period of the zygote lasts for about __________ weeks and when it implants into the wall of the uterus it becomes the embryo

conception

prenatal development begins with this

sperm and the ovum

prenatal development occurs after the development of the.....

before

prenatal development refers to all the development that occurs _________ a child is born

embryo

second stage-period of the___________

kidneys

secreting urine into bladder

brain scans

show babies can dream

testes

sperm are produced in the...

smallest

sperm cells are the ____________ cells in the human body

ears

take shape

outside

testes are the only organ in the human body that is __________ the abdominal cavity

shape

the _________ of the blastocyst: circle ball with indents, outer cells to make placenta

first cell

the __________ of a human being called a zygote is formed when a sperm fertilizes an egg

1/4 1 2/3 4

the amount of fluid increases after fertilization: 12 weeks ______ cup 20 weeks ________ cups 36-38 weeks _________ cups

oxygen

the child recieves _________ through the placenta which gets its from the mother

amniotic fluid

the job of the _________ is to act as a cushion to protect the child while growing in the uterus

seperate

the mothers blood and the babys blood are two ________ collections of blood they never mix

carbon dioxide

the placcenta also helps to bring oxygen to the developing embryo and send ___________ __________ to the mother

blood vessels

the placenta is a collection of ________________ that take in nutrients from the mother and sends back waste materials from the baby to the mother when the waste materials enters the mother blood stream her kidneys will filter out the waste materials

temperature

the production of sperm is effected by...

chromosome

the small capsule-shaped head of the sperm cell contains the ______ contribution from the male, the whip-like tail helps to propel the sperm cell towards the ovum

cord

the umbilical _______ connects the lacenta to the mewborn child at the belly buttton

arteries

the umbilical cord has two _______ and one vein to help carry nutrients and oxygen to the baby and to remove wastes from the baby

exponentially

the zygote divides...

three

there are ______ periods of prenatal development

fetus

third stage-period of the __________

age and hormones

two other conditions that can effect sperm production

6th

week -3/4 inch long

sex

week 17- ____ of the child can be determined by ultrasound

eyelids

week 22- ____ and eyebrows are fully developed

hear

week 24- fetus can _____ will startle to large noises

week 29

weight gain now exceeds growth in length baby is putting on pfat to provide warmth and energy after birth

fertilization

when two nuclei fuse, ________ is accomplished

ovum

womens bodies have all the _________ they need before they are born

ankles

wrist and ____ form