early embryo Flashcards
(11 cards)
zygote
A single-cell formed when sperm fertilizes egg; the first cell of a new organism.
What does totipotent mean
A cell that can develop into any cell type, including extraembryonic (placenta) tissues.
What is a blastula (blastocyst in mammals)?
A hollow ball of cells with a fluid-filled cavity (blastocoel); cells start to specialize
What does pluripotent mean?
A cell that can become any body cell, but not placenta
What is gastrulation?
A process where the blastula reorganizes into 3 germ layers: ectoderm, mesoderm, endoderm.
What is a gastrula?
The 3-layered embryo formed after gastrulation.
What does multipotent mean?
Cells that can develop into a limited range of related cell types.
What does the ectoderm form?
Skin, nervous system, eyes.
What does the mesoderm form?
Muscles, bones, blood, heart, kidneys.
What does the endoderm form?
Lining of digestive tract, lungs, liver, pancreas
What is organogenesis?
The formation of organs from the three germ layers.
