18 Questions
What term is used for the development of new individuals by means of asexual reproduction?
Blastogenesis
Which phase of ontogenic development involves the formation of body structures and organs?
Organogenesis
What marks the end of the embryonic period in ontogenic development?
Organ formation
Which term refers to the development and maturation of sex cells called gametes?
Spermatogenesis
During which period do organs grow and begin to function in ontogenic development?
Fetal period
What is defined as the time from fertilization to the earliest stages of organ development?
Embryonic period
What is the main difference between centrolecithal and telolecithal ova?
The distribution of yolk in the egg
What is the morphology of a morula?
Solid ball of blastomeres
In mammalian blastocysts, what are the two populations of cells present?
Inner cell mass and trophoblast
What is the composition of the avian blastoderm in terms of areas?
Area pellucida and area opaca
During blastogenesis, what morphogenic process gives rise to the three germ layers?
Gastrula
Which cells give rise to the body of the embryo, yolk sac, and allantois in blastogenesis?
Inner cell mass
What is the role of the notochord in the embryonic development process?
Induces formation of the head process
Which structure marks the location of the future vertebral column and base of the cranium?
Notochord
What is the adult fate of the notochord in embryonic development?
Nucleus pulposus of intervertebral discs
Which layer of cells in blastogenesis later forms the yolk sac?
Hypoblast
What induces overlaying ectoderm to become neuroectoderm to form the neural plate?
Notochord
Which structure undergoes cavitation to give rise to body cavities in blastogenesis?
Somatic mesoderm
Learn about the formation of body structures and organs through cell division and differentiation in embryogenesis. Explore the development of new individuals through asexual reproduction in blastogenesis. Discover the stages of ontogeny from zygote to postpartum life.
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