Implantation, Gastrulation, and Neurolation Flashcards
Implantation
-what is it
-where are enzymes secreted and what do they do
-what hormone is mainly secreted from where and what does that hormone do?
-what takes over the secretion of estrogen and progesterone
-embedding of blastocyst in endometrium
-enzymes secreted from tropoblast that digest tissues and blood vessels in endometrium
-hCH which maintains the corpus lutem and secretes high levels of estrogen and progesterone
-placenta
Gastrulation and tissue formation
-which week of development
-what forms between the inner cell mass and tropoblast. what is it called, and what is going to happen here. what is the surrounding sac called?
-what does the inner cell mass form and what 3 layers does that consist of, and what baby structures does each layer form?
-2nd
-space between forms called the amniotic cavity, baby development. amnion
inner cell mask forms the embryonic disk with
1. ectoderm: Nervous system, epidermis
2. mesoderm: skele, muscles, rep. organs
3. endoderm: resp system+dig system lining and endocrine glands
-What is gastrulation defined as?
-what does it mark the start of
-morphogenisis is dependent upon what?
the process of developing the 3 primary germ layers. the embryo is now called a gastrula.
-morphogenisis
-differentiation (ability of cells to become different cells)
Neurolation
-what week, what mainly forms
- skeleton formaation
-what cells develop in embryonic disk. how do they form basic skeleton framework - nervous system formation
-what will it develop from
-how do those cells form it, and what do they turn into
-what is the process called, and what is needed to supplament it
neurolation marks beggining of _______ ________.
3rd, NS and skeleton
-mesoderm cells form basic skeleton by forming a rod structure called the notochord
-develops from ectoderm which thickens and folds into a neural tube which eventually develops into brain and spinal cord
-neuralation, folic acid
organ formation
