ANS 123 Lec
Card Set Information
ANS 123 Lec
definitions and main points of lectures.
What do we need for development to happen???
-changes in physiological needs as animals mature.
-physical consequence of growing bigger--> "pure physics
: (eye can only be so big).
deposit of material between cells
increase in cell #
increase in cell size
from a lower to higher form of complexity
increase in size (height, wt, body ash, body protein, lean tissue wt)
SUMMARY (Lecture 1)
a growing living thing has to alter its form and function.
Growth cannot happen without development.
development continues throughout life until death.
Prenatal Development (importance)
important for the later health of animal
Prenatal Development continued
Preimplantation phase-from fertilization to implantation/attachment
Embryonic phase-where all major organ systems are established
Fetal phase-growth and refinement of organ systems
Influence of PRENATAL DEV. post-natally
baby survival is proportional to birth weight
depending on what happened during prenatal life
-->it affects the kind of disease you get as an adult. (ex
: heart disease, diabetes)
it's similar to other species
from conception until development of organs
from then until birth
SUMMARY (Lecture 2)
Prenatal development is an important period of an organism life (time, future performance, future health, little flexibility)
Development is progressive, continuous and results in increasing complexity
Similar between species
All cells have the necessary information to direct the formation of a whole individual (nuclear totipotency)
changes that are inheritable from cell to cell.
can last for multiple generations
changes remain through cell division