3.5 Cell specialisation and organisation Flashcards
How do cells differ
They differ in functions, shape and mumber of/ type of each organelle
Define cell differnetiation
The process by which cells become specialised for different functions
Why does a cell become specialised
SO it can suit the role that it will carry out
What is a tissue
A collection of similar cells that perform a specific function
Give two examples of tissue cells
Epithelial cells
Xylem
What are Epithelial cells
They line the surface of organs and often have a protective or secretory function
What is a Xylem and what is its function
Xylem are made up of a number of similar cells
It is used to transport water and mineral ions throughout the plant and gives mechanical support
What is an organ?
A group of tissues that perform a variety of functions but have one predominant major function
What are the tissues that make up the stomach (an organ) (3)
Muscle cells-They churn and mix the stomach contents
Epithelium- Protects the stomach wall and produces secretions
Connective tissue-Holds the other tissues together
What are the tissues that make up the leaf (an organ in a plant)
Palisade mesophyll- adapted for gas exchange
Epidermis- Protects the leaf and allows gaseous exchange
Phloem- Transports organic materials away from the leaf
Xylem- Transports water and ions into the leaf
What is an organ system
Organs that work together to perform particular functions more efficiently
