First Five Name two parts of the plant male reproductive
structure. What does the pistil consists of? What does the fruit
represent? After male pollination, how does the male gamete reach
the ovule?
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Announcements Cumulative Biology Exam Start Studying! Turn in
past work!! Grades currently updated
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Human Reproduction
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Think About it- Human Reproduction What was needed to create
you? Where are such cells produced? How does the fetus
develop?
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Sexual Reproduction in Humans: Three Stages production of
gametes eggs in females sperm in males gametes are haploid: have a
single set of chromosomes (DNA) fertilization joining of gametes
fusing of the nuclei of the gametes zygote the new, fused cell
diploid: has pairs of chromosomes (DNA)
Slide 6
Test What You Know In your current seating arrangement groups,
match the scientific vocab to the correct arrow. Do NOT copy to
your predictions to your own image sheet. Wait to check if your
prediction is right. You will have 5 minutes to make you
predictions
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Male Reproductive System Sperm Duct Scrotum
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Male Reproductive System testes located inside scrotum
production of sperm (male gametes) production of male hormones
scrotum sacs of skin where testes are located keep testes from
getting overheated sperm ducts carry sperm from testes, through
glands, to urethra
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Male Reproductive System prostate gland production and
secretion of nutrient-rich fluid fluid joins with sperm to form
semen urethra tube inside penis that moves either urine or semen
penis excretion of urine movement of semen
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Check your predictions and now write in your own page
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Female Reproductive System
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Ovaries production of eggs (female gametes) Oviducts also
called Fallopian tubes lead from ovaries to uterus not directly
connected to ovaries
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Female Reproductive System Uterus thick-walled muscular bag
with soft lining location of baby development Cervix narrow opening
of uterus Vagina muscular tube leading from cervix to outside of
womans body
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Check your Predictions and now write in your own page
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Male & Female Gametes Eggs: relatively large do not move
much begin to develop before birth at birth, a girl has thousands
of immature eggs
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Male & Female Gametes Sperm: relatively small actively move
produced from puberty on
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Fertilization
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Check your Predictions and now write in your own page
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M ENSTRUAL C YCLE
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Menstrual Cycle Beginning at puberty Immature eggs mature
inside the ovaries Once mature, an egg will be released from the
ovary Usually only one mature egg is released per month
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Menstrual Cycle The full cycle is about 28 days long The cycle
involves loss of the uterus lining Day 1 Beginning of bleeding
re-growth of the uterus lining Day 5 Bleeding has usually stopped
An egg begins to mature in the ovary maturation and release of an
egg cell On day 14, the egg is released The egg travels through the
oviduct Pregnancy, if the cell is fertilized Menstrual cycle stops
during pregnancy Loss of the uterus lining, if the egg is not
fertilized The cycle begins again
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Slide 23
From Fertilization to Zygote to Implantation
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Pathway for Fertilization
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Fertilization
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Path of Zygote
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Cleavage of Human Embryo
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From Fertilization to Implantation After fertilization, the
embryo travels through the oviduct, into the uterus. The embryo
will implant in the wall of the uterus.
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Implantation
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Implantation and After Two key events after implantation of the
embryo in the uterine wall are: Differentiation of cells
Development of the placenta and amnion
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Cellular Differentiation The changing of unspecialized
embryonic cells into the specialized cells, tissues and organs of a
multicellular animal
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Cellular Differentiation
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Development of Placenta and Amnion Placenta an organ made of
tissues from both the mother and embryo Allows for exchange of both
nutrients and waste between the mother and embryo Exchange happens
through villi
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Placenta
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Villi finger-like projections that increase the surface area
for absorption similar to the villi in the small intestine
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Blood Flow in the Placenta Oxygenated blood enters the placenta
through the mothers artery. Oxygen and nutrients move freely in
placenta and pass to the villi by diffusion Oxygen and nutrients
are delivered to the baby through the umbilical vein Carbon dioxide
and wastes are returned to the placenta by the umbilical
arteries
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Development of Placenta and Amnion Amnion A strong membrane
that surrounds the developing embryo/fetus Secretes amniotic fluid
A fluid that helps support and protect the developing embryo/fetus
Amnion
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Checkpoint In your notebooks Name the steps that lead up to
implantation
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FROM IMPLANTATION TO BIRTH Lets see what you know In your
current seating arrangement groups, match the scientific vocab to
the correct arrow.