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Biology

Human Body

QuestionAnswer
Fertilization The nuclear fusion of sperm and egg. week one
Cleavage First mitotic division resulting in multi-cellur embryo.All cells are identical.
Morula Final complete collection of identical cells. After 2-3 weeks.
Blastula Formation Cell mass forms a hollow cavity.
Cellular differentiation Cell structure and function changes in differently way in different cells due to different gene expression.
Gastrula 3 layers
Ectoderm Outer layer of cell.
Endoderm inner layer of cell.
Mesoderm Middle layer
Nervous Tissues Conduct electron messages.
Muscle Tissue Allows movement.
Connective Tissue Many types and functions(binds organs together as tendons). bone, blood, fat, cartilage.
Cranial Protects the brain.
Vertebral canal Protects the spinal cord.
Thoracic Cavity Protects heart and lungs.
Abdominal Cavity Protects organs of digestion and reproduction.
Created by: baileythegr8
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