Embryology

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Embryology
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Announcements
there will be no quiz next week be prepared
for the presentation -group members should
participate in the presentation. -those
who need demo on how to work on PowerPoint,
please wait after the lab. -it is a good
chance to develop you ability to talk to
audience with general background. keep track of
your class work and it is a good time to start
checking your ID and grads in my book
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Today
embryology major stages and evolutionary view
of different flavors examples
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Embryology
embryo early developmental stage of a
vertebrate or it is a compact mass of
cells beginning with the 16 or
32-cell stage. embryology is the biological
science dealing with
embryos and embryonic development.
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Embryonic development in animals
1-gametogenesis process of sperm and ova
production by. 2-fertilization process of
Joining sperm and ova to produce the
diploid genome (mammals are diploid) and
formation of a Zygote how fertilization
occur fish. chickens. mammals..
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Embryonic development in animals
3-cleavage it is mitotic process that start
once the zygote is formed morula it
is the 32 and 64-cell stage implantation in
the uterine wall occur at this stage 4-gastrulatio
n (gasrtula formation) gastrula is an embryo
consisting of three germ layers
ectodermskin, hair, nervous system
endodermbody cavity, visceral organs
mesodermmuscle and connective tissues
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Embryonic development in animals
5-organogenesis organ formation it
is basically cell differentiation the
embryo is called fetus
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Embryonic development in Human
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I got the picture
-Japanese Medaka zygote at different stages
follow the lab manual -fresh water aquarium
snail development -duck embryo dissection
follow the handout protocol. -prepared sea star
slides arranged numerically according to
developmental stages.