Download Do Now

Topic: Reproduction
Aim: Describe the 2 types of development and
how the fetus is nourished.
Do Now: Embryonic development notes
#’s 10 - 16
HW: Finish reading notes.
Chromosome structure Review ISN
CL Mitosis and Asexual Reproduction due
tomorrow!
10. Identify the process represented by process 1. Fertilization
11. Identify the name structure 2 and how many
chromosomes it contains (in humans).Zygote – 46 chromosomes
12. Identify the process occurring in structures 3 and 4.
Cleavage
13. Identify structure 5. Morula
14. Identify structure 6. Blastula
15. Identify structure 7 and the three layers that make up this
structure. Gastrula – endoderm, mesoderm, ectoderm
16. Identify the process that occurs after structure 7 is
formed. Differentiation
Identify each stage in cell division.
A
Telophase
D
Anaphase
B
Interphase
C
Metaphase
E
Interphase
F
Prophase
Describe the effect of a blockage in areas A and
B on the male and female reproductive systems.
Topic: Reproduction
Aim: Describe the 2 types of development and
how the fetus is nourished.
Do Now:
1. Take out the chromosome structure ISN.
2. Compare and Contrast mitosis and meiosis
using a Venn Diagram.
HW: Asexual Reproduction Review ISN
Interphase
centromere
chromatid
centromere
gene
chromatid
MITOSIS
2 daughter cells
Asexual
Reproduction
Chromosome #
stays the same
Used to reproduce
somatic cells
1 division
•
•
•
•
•
# of cells
Type of reproduction
Chromosome #
Types of cells
Divisions
MEIOSIS
SIMILARITIES
Chromosome
replication occurs
Cytokinesis occurs
Same phases
4 daughter cells
Sexual Reproduction
Chromosome # splits
in half
Used to produce
gametes
2 divisions
• Thin layer that forms a sac
1.
Describe around the embryo
the
amnion.
2. Identify • Amniotic fluid
the
substance
found inside
the amnion.
3. Describe
the
importance
of the
amniotic
fluid.
• Protects, cushions and
insulated the embryo.
• Provides food and oxygen
4. Describe
•
Removes
wastes
the
importance
of the
placenta.
5. Identify
the
structure
that
connects
the fetus
and the
mother.
• Umbilical cord
6. Identify • Blood vessels
what is
found inside
the
umbilical
cord.
7. Identify
the
substances
that can
pass from
the mother
to the
fetus.
• Oxygen and nutrients
• Alcohol and drugs
8. Identify • Metabolic wastes
the
substances
that can
pass from
the fetus to
the mother.
9.Does
blood from
the mother
and fetus
mix? Explain
why or why
not.
• No
• Mother and child have their own
separate circulatory system.
10.
Identify
each labeled Placenta
structure in
the internal
development Umbilical
diagram on cord
the back of
this page.
Oviduct
Amniotic
fluid
cervix
External
Development
• Development
outside
female
• In water or
on land
• Source of
food - YOLK
• Ex: Birds,
fish, frogs…
Egg Layers:
All turtles
All tortoises
All crocodilians (group of large reptiles that includes
crocodiles, alligators and caimans)
Some lizards: Iguanas, Water dragons, Geckos, Veiled
chameleons, Panther chameleons
Iguanas
Veiled chameleons
Water dragons
Geckos
Panther chameleons
•
Development
inside
Internal
Development female
Let’s summarize…
1. What is the food source of the embryo that is
developing externally?
2. What is the food source of the embryo that is
developing internally?
Amniotic
fluid
Umbilical
cord
•By only Day 20
foundations of the
brain, spinal cord
and nervous system
are already
established.
•By Day 21 the heart begins to beat.
•By the 4th week, the backbone and muscles
are forming. Arms, legs, eyes, and ears have
begun to show.
•Now one month old, the embryo is 10,000 times larger than
the original fertilized egg and is developing rapidly.
•At Week 5 five
fingers can be
discerned in the
hand. The eyes
darken as
pigment is
produced.
•Brain waves can
be detected and
recorded.
•At Week 6 the liver is now taking over production of
blood cells, the brain begins to control muscle
movements and organs.
•By the 8th Week
the now-called
fetus is a little
more than an
inch long. The
fetus has now
everything found
in a fully
developed adult.
•The heart has been beating for more than a month, the
kidneys are functioning; the stomach is producing
digestive juices.
•And it responds to touch.
• At Week 9 the tiny
one has fingerprints
and will curve its
hand around an
object placed in its
palm.
• By Week 10 the
fetus can squint,
swallow, and
wrinkle its forehead.
At the 11th week, the fetus is now about 2 inches
long. Urination occurs. Muscle movements are
becoming more coordinated.
3m
•Now 3 months old, the unborn sleeps, awakens, and
exercises its muscles. It “breathes” amniotic fluid to help
develop its respiratory system.
Fine hair is growing on the head.
•At 4 months the
fetus is 8-10
inches long and
weighs half a
pound.
•The mother
starts to “show.”
The baby’s ears
are functional.
•It can hear its
mother.
•The fetus at 5 months is now about 12 inches long. There is
definite movement felt by the mother. The unborn may jump
in reactions to startling or loud noises.
•At the 6th
month oil and
sweat glands
are now
functioning. The
delicate skin is
protected from
the fetal waters
by a special
ointment called
“vernix.”
Born now and given proper care,
the baby would survive…
•At Month 7 the baby now uses the four senses of hearing,
vision, taste, and touch. The child can respond to his or her
mother’s voice.
•In the 8th
month the skin
begins to thicken
with a layer of
fat stored
underneath for
insulation and
nourishment.
Antibodies
increasingly
build up.
•The baby is nearly ready for life outside the womb.
•Toward the end of
this month the baby
is ready for birth. By
this time the infant
normally weighs 6 to
9 pounds, and his or
her heart is pumping
300 gallons of blood
per day.
http://www.brainpop.com/health/geneticsgrow
thanddevelopment/fetaldevelopment/