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Development презентация
Содержание
- 1. Development
- 2. After fertilization a diploid cell forms which
- 3. In animal development, there are four steps.
- 4. After fertilization, zygote starts the first of
- 6. Each blastomere divides repeatedly until 32 cells
- 8. After morula, cells continue divide mitotically and
- 10. After blastula some cells migrate. Inner portion
- 12. After formation of these layers each layer
- 13. During differentiation Ectoderm develops into ; Endocrine glands, Nervous system, and Skin.
- 14. Mesoderm develops into; Blood, Skeletal
- 15. Endoderm develops into; Digestive system, respiratory system, pancreas and liver.
- 16. 1. Shell: Some animals lay egg with
- 18. The Chorion It is located under the
- 19. Vitellus (Yolk Sac) Yolk sac store protein,
- 20. The Amnion: Amnion is filled by amniotic
- 22. DEVELOPMENT in HUMAN
- 23. In human fertilization occurs in the fallopian
- 24. Implantation takes place 7 days after fertilization
- 26. MULTIPLE BIRTHS A) FRETERNAL TWINS:
- 28. IDENTICAL TWINS After formation of zygote from
- 31. WONDERFULL facts About Reproduction
- 32. The offspring of Black Bear is about
- 33. The longest gestation periods of development is
- 34. The mouses reach the ability to reproduce
- 35. The highest number of offspring in one
After fertilization a diploid cell forms which is called zygote. Zygote develops into new organism in anywhere. This process is called development.
Слайд 2After fertilization a diploid cell forms which is called zygote.
Zygote develops
into new organism in anywhere.
This process is called development.
This process is called development.
Слайд 3In animal development, there are four steps. These are:
Cleavage
Morula
Blastula
Gastrula
Organogenesis
Animal Development
Слайд 4After fertilization, zygote starts the first of mitotic cell division.
Formation of
two cell from zygote is known as cleavage.
These cells are called blastomers.
These cells are called blastomers.
cleavage
Слайд 6Each blastomere divides repeatedly until 32 cells are formed.
This group of
cells is called morula.
morula
Слайд 8After morula, cells continue divide mitotically and forms ball like structure
which is called blastula.
In blastula, several hundered cells are formed around a cavity filled with fluid.
In blastula, several hundered cells are formed around a cavity filled with fluid.
blastula
Слайд 10After blastula some cells migrate. Inner portion of ball and 3
different layer are formed.
This three layered structure is called blastula.
These layers are Endoderm, Ectoderm and Mesoderm.
This three layered structure is called blastula.
These layers are Endoderm, Ectoderm and Mesoderm.
GASTRULA
Слайд 12After formation of these layers each layer differentiate into organs and
tissues.
This process is called differentiation.
This process is called differentiation.
Organogenesis
Слайд 14Mesoderm develops into;
Blood, Skeletal system, Muscles, Circulatory system, Excretory
system, and Gonads.
Слайд 161. Shell: Some animals lay egg with shell. Shell contains CaCO3
and it protects the embryo.
It forms in oviduct after fertilization which is impermeable to water but permeable to gases.
Shell is seen in reptiles and birds.
It forms in oviduct after fertilization which is impermeable to water but permeable to gases.
Shell is seen in reptiles and birds.
Extraembryonic
Membranes
Слайд 18The Chorion
It is located under the shell.
Chorion allows gas exchange.
3. The
Allantois: It is a sac which stores excretory substances.
It is large in reptiles and birds and small in mammals.
It is large in reptiles and birds and small in mammals.
Слайд 19Vitellus (Yolk Sac)
Yolk sac store protein, lipid and carbohydrates.
It is large
in reptiles and birds. But small in mammals. Because mammals embryo take nutrients from its mother.
Слайд 20The Amnion:
Amnion is filled by amniotic fluid.
It supports the embryo.
6.
Placenta: Placenta is a link between embryo and mother which nutrient, and hases may pass.
It has rich small blood vessels.
It has rich small blood vessels.
Слайд 23In human fertilization occurs in the fallopian tube.
After fertilization, zygote starts
division mitotically. However it is moved toward uterus by cilia.
Слайд 24Implantation takes place 7 days after fertilization in uterus.
In first months
placenta forms. Also after 266 days child birth.
Слайд 26MULTIPLE BIRTHS
A) FRETERNAL TWINS:
In some woman both of two ovary produce egg in month.
If there are sperms in oviduct at ovulation time. Two eggs are fertilized by two different sperms.
They implant at different sites of uterine wall and develops independently.
If there are sperms in oviduct at ovulation time. Two eggs are fertilized by two different sperms.
They implant at different sites of uterine wall and develops independently.
Слайд 28IDENTICAL TWINS
After formation of zygote from one egg and sperm. It
divides mitotically.
Group of cell splits into two parts in blastula stage.
Each group of cells develop into a child independently.
Identical twins have identical properties.
Group of cell splits into two parts in blastula stage.
Each group of cells develop into a child independently.
Identical twins have identical properties.
Слайд 32The offspring of Black Bear is about 300 grams at birth.
The
haviest offspring is African Elephant, 110 kilograms.
The smallest offspring is Kangaroo, 0,75 grams.
The smallest offspring is Kangaroo, 0,75 grams.
Слайд 33The longest gestation periods of development is seen in Indian Elephant,
607-641 days.
The least gestation periods of development is seen in Opossum; 13 days.
The least gestation periods of development is seen in Opossum; 13 days.
Слайд 34The mouses reach the ability to reproduce 35-49 days after birth.
The
whale can reach the ability to reproduce 6-12 years after birth.
Human can reproduce 12-15 years after birth.
Human can reproduce 12-15 years after birth.
Слайд 35The highest number of offspring in one birth is seen in
rabbits;
15 offsprings in one birth.
15 offsprings in one birth.
