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formation of egg membraneovum with egg membrane is called ova egg on the basis of origin the egg membrane are of three types
types of spermmainly two types 1 flagellated sperm - generally all sperm are monoflagelated but in todfish or opsonus sperm is biflagelated2 non
spermatocytogenesisin this process four spermatid develop from one pgci multiplication phasethe spermotogonia or sperm mother cells lie next to the
the process by which gametes are produced in the gonads is known as gametogenesisthe process of formation of male gametes or sperm is known as
fundamental characters of embryonic development1 gametogenesis-testes amp ovaries are collectively called as gonads similarly
branches of embryology-1 descriptive embryologythis field of embryology is associated with the morphological description of
theory of pangenesis -proposed by charles darwinaccording this miniature present in the every body cell ie called
germ layer theory -proposed by pander studied chick embryo developmentcoined the term ectoderm mesoderm amp
organizer theory -it was propounded by spemann 1901he was given nobel prize of 1935 for this wrokhe studied the embryonic development of frog newt
gradient theory -it was given by t boveri amp was supported by mc childchild called it as metabolic axial gradient theoryaccording to it the egg has
regulative theoryit was propounded by hens drieschhe performed experiments on the eggs of sea urchin similar to the experiments performed by rouxhe
mosaic thoery -it was given by w rouxhe studied the development of frogs egg he destroyed one cells by a hot needle out of 2-cells formed as a result
germ plasm theory -it was proposed by weismannaccording to it two types of cells are formed during embryonic development viz - germ cell amp somatic
baers law -it was given by ke von baer von baer was the first scientist who studied the embryology systematicallyaccording to it in the embryonic
theory of epigenesis -it was propounded by c f wolff and supported by von baeraccording to it the egg contains the substances which are required in
historical reviewanoximander 600 bc was the first western philospher who proposed the idea that living creatures arose from the moist
difference between reproduction system of man and rabbit
developmental disorders -1 amnionitis-inflammation of amnion due to infection2 abortion-escape of a embryo
lactation -production of milk in the females breasts after delivery is lactationprolactin is responsible to synthesize milk in breastoxytocin is
parturition -gestation period is of 280 days in rabbit 28 days parturition is the expelling of fully mature young ones from the mothers
gastrulation -morphogenic movements are occured 3 germinal layers are formed ectoderm endoderm amp mesodermendoderm is formed first mesoderm is
blastulation -type of blastula is blastocyst or trophoblastulaouter layer of cell becomes flat and form trophoblast or trophoectoderm which receives
morulation -32 celled embryo is solid looks like little mulberry known as morula it reaches uterus on fourth daystill it is covered by fertilization
cleavage -holoblastic amp unequal first plane is meridional 2 blastomeres are formed 1 megamere amp another micromere2nd plane is also meridional but
copulation -followed with the help of penis sperms are ejaculated deep in vaginapolyestrous ie can capulate any time thorughout the