Unit 2 Flashcards
Zygote
Fertilized egg
What happens when the sperm goes inside the egg?
the zygote (fertilized egg) goes through cell division repeatedly.
Cell division through mitosis gives rise to what?
Many identical cells
Differentiation
a process that creates special structures and functions
Specialized cells become
tissues -> organs -> organ systems
stem cells
undifferentiated cells that become differentiated into one or more types of specialized cells
Embryonic Stem Cells
cells that haven never differentiated
Adult stem cells
cells found in adult bone marrow that are partially differentiated and can become bone, blood, cartilage, fat, and connective tissue
implanted blastocyst becomes gastrula:
embryo with three differentiated germ levels
Organogenesis
the process of body organ and organ system formation that follows gastrulation (folding of the cell)
organism
one individual member of a species: a living thing
organ system
set of organs working together for a common function
organ
set of tissues working together for a common function
tissue
group of cells working together for a common function
cell
most basic unit of life that has all the characteristic of life
cell cycle
a repeated pattern of growth, DNA duplication and cell division that occurs in eukaryotic cells
2 purposes in cell division
growth and repair