Examlex
What does tea contain in addition to caffeine?
Archenteron
The central cavity of the gastrula stage of embryonic development that is lined with endoderm; primitive digestive system.
Endoderm Layer
The innermost layer of cells or tissues in an embryo that gives rise to the lining of the gastrointestinal tract and associated organs.
Fertilization Cone
A cellular structure that extends from a sperm to penetrate and fertilize an egg cell.
Egg Membrane
The protective outer layer surrounding an egg cell, which can include structures like the chorion in birds or the zona pellucida in mammals.
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