Cells, Tissues And Organs Flashcards
What is differentiation?
The process of cells becoming specialised.
Where are stem cells found?
In animal zygotes (very young embryos) and in plants of all ages.
Describe differentiation in plant and animal cells.
Animals cells differentiate at an early stage. They become specialised for a particular function and cannot change into different types of cells. Differentiation is mainly for replacement and repair.
Plant cells keep the ability to differentiate after having done so once.
Name some specialised cells.
Sperm, egg, palisade, cilated, root hair, nerve, red blood.
What is tissue?
A group of specialised cells with a similar structure and function all working together.
What are the four main kinds of animal tissue?
Epithelial, connective, nerve and muscle
What are organs?
Tissue that work together to perform a larger function. Leaves and the heart are both organs.
What are organ systems?
Organs working together, such as the circulatory system, the nervous system and the digestive system.
