Download Spermatogenesis

Fertilization and Embryo Develpment
ສອນໂດຍ ອາຈານ ສນຕ
ັ ິ ນາມມະວງສາ
ົ
ຂະແໜງການວໄິ ຈແລະ ທດ
ົ ລອງສດ
ັ
What is a cell ?
• Cells are the basic building blocks of all living
things. The human body is composed of trillions of
cells. They provide structure for the body, take in
nutrients from food, convert those nutrients into
energy, and carry out specialized functions. Cells
also contain the body’s hereditary material and can
make copies of themselves.
• Cells have many parts, each with a different
function. Some of these parts, called organelles,
are specialized structures that perform certain tasks
within the cell
• Most of cell are made up of the cytoplasm and
the nucleus
• The nucleus is the spherical body more or less the
center of the cell. Be to the heart and brain of cell
because it carries genetic material and body function
• The cytoplasm contain many secretion production
such as lipid droplets and highly special structure
called Organelles which play important in cell function
• Ribosome are the organelles in cytoplasm where the
amino acid are assembled to form protein
• Mitochondria are organelles for regenerating energy of
the cell in the form Adenosine Triphosphate (ATP).
Mitochondria contain the nucleic acid (RNA and DNA)
• Lysosomes are small, usually spherical body that
contain digestive enzyme which break down the major
constituent of living organisms called “suicide bags”
• Polymorph-nuclear leucocytes contain lysosomes and
these cell have ability to phagocytize bacteria or other
foreign substance which might enter the blood stream
Spermatogenesis
• Spermatogenesis is the process in which
spermatozoa are produced from male primordial
germ cells by way of mitosis and meiosis. The initial
cells in this pathway are called spermatogonia.
• Spermatogenesis produces mature male gametes,
commonly called sperm, which are able to fertilize
the counterpart female gamete
• Spermatogenesis takes place within several structures of
the male reproductive system (seminiferous tubules)
Spermatogenesis
• Spermatocytogenesis, a diploid spermatogonium,
which resides in the basal compartment of the
seminiferous tubules, divides mitotically, producing
two diploid intermediate cells called primary
spermatocytes.
• Each primary spermatocyte then moves into the
adlumainal compaertment the seminiferous tubules
and duplicates its DNA and subsequently undergoes
meiosis to produce two haploid secondary sperma -
tocyte
Spermatogenesis
http://www.usi.edu/science/biology/mkhopper/ap_labs/2402/Reproductive%20Physiology/Spermatogenesis.htm
Oogenesis process
• Just like spermatogenesis, oogenesis involves the formation
of haploid cells from an original diploid cell, called a primary
oocyte, through meiosis.
• The female ovaries contain the primary oocytes. There are
two major differences between the male and female
production of gametes.
• First of all, oogenesis only leads to the production of one
final ovum, or egg cell, from each primary oocyte of the four
daughter cells that are produced when the primary oocyte
divides meiotically, three come out much smaller than the
fourth.
•
These smaller cells, called polar bodies, eventually
disintegrate, leaving only the larger ovum as the final
product of oogenesis. The production of one egg cell via
oogenesis normally occurs only once a month, from
puberty to menopause.
• Oogonium —(Oocytogenesis)—> Primary Oocyte —
(Meiosis I)—> First Polar Body (Discarded afterward) +
Secondary oocyte —(Meiosis II)—> Second Polar Body
(Discarded afterward) + Ovum
Embryo development
Embryo development
Embryo development
th
13
day
Embryo development
http://www.mahjoob.com/en/forums/275459-3-let-there-light/
Embryonic development
Differentiation
• Ectoderm
• Mesoderm
• Endoderm
Ectoderm
່ີ ຢ
• ເປ
ູ່ ພາຍນອກສາມາດພັດທະນາມາ
ັ ນສ
່ ວນທ
ເປ
ັ ນ
– ລະບ
ົ ບປະສາດ
– ອະໄວຍະວະຮັບຄວາມຮ
ູ ້ ຶ ສກ
້ າຊ
– ອະໄວຍະວະປ
ຸ ້ ມ ແລະ ໍຄ
ົ ກຫ
່ າງກາຍ
ູ ຮ
Mesoderm
• ສາມາດພັດທະນາມາເປ
ັ ນ:
–ກ
້ າມຊ
ີ້ ນ
–ຜ
ິ ວໜັງ
– ລະບ
່ າຍ
ົ ບຂັບຖ
– ລະບ
ື ບພັນ
ົ ບສ
– ເສ
ື ອດ
ັ້ ນເລ
່ື ອບ
– ເຍ
ຸ ຕ
່ າງໆໃນຮ
່ າງກາຍ
Endoderm
• ພັນທະນາໄປເປ
ັ ນ:
່ື ອບ
– ເຍ
ຸ ໃນລະບ
ິ ນອາຫານ
ົ ບທາງເດ
– ລະບ
ົ ບຫາຍໃຈ
–ສ
່ ວນຂອງຕັບ
– ຕັບອ
່ ອນ
–ຕ
່ ອມໄທລອຍ
– ກະເພາະປັດສະວະ
່ື ອບ
– ເຍ
ຸ ກະເພາະປັດສະວະ
Reference
• P.G.C. BEDFORD; 2001. Atlas of Canine surgical Technique.
Veterinary College Field Station. (ພາສາອັງກ
ິ ດ)
• ກ,ງໄກ ໄພຣນ
ູ ດຊາກສັດ. ຄະນະສັດຕະວະແພດ.
່ າພ
ິ ຣັນກ
ິ ດ. 2001. ການຜ
ິ ສ
ມະຫາ
ິ ວທະຍາໄລກະເສດສາດ. ິ ວທະຍາເຂດບາງເຂນ. (ພາສາໄທ)
• ຄະນະກະເສດສາດ. 2002. ເອກະສານປະກອບການສອນວ
ຸ ງພັນ
ິ ຊາ: ການປັບປ
ສັດ ແລະ
ປະດ
ຸ ງຄັນ. ມະຫາວ
່ ງຊາດ. ກະຊວງສ
ິ ທະຍາໄລແຫ
ຶ ກສາທ
ິ ການ.
• ນັດທະພອນ ຂາລ
ູ ພັນ. 2009. ິ ວຊາສັດຕະວະສາດ. ຄະນະວ
ິ ທະຍາສາດ. ມະຫາວ
ິ
ທະ ຍາ
ໄລກະເສດສາດ. ິ ວທະຍາເຂດບາງເຂນ. (ພາສາໄທ)
Anything’s to ask