Embryology. Announcements there will be no quiz next week be prepared for the presentation -group members should participate in the presentation. -those.

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Presentation transcript:

Embryology

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

Today *embryology *major stages and evolutionary view of different flavors *examples

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.

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…..

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-gastrulation (gasrtula formation) *gastrula is an embryo consisting of three germ layers; ectoderm…skin, hair, nervous system endoderm…body cavity, visceral organs mesoderm…muscle and connective tissues

Embryonic development in animals 5-organogenesis *organ formation it is basically cell differentiation *the embryo is called “fetus”

Embryonic development in Human

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.