diagram sequence of events in penetration of coverings and plasma membrane of egg. spermatozoon penetrates in ovum

acrosomal acrosome anatomy background biology cell cellular chromosome corona cortical design diagram dna education egg equatorial exam female fertile fertility fertilization fertilize follicle gametes genetic health human icon illustration inner insemination isolated life medical medicine membrane nucleus oocyte ovulation ovule ovum patch perivitelline plasma pregnancy region reproduction reproductive science semen sequence sex space sperm spermatozoon structure vector white zygote