Tissues, Organs and Organ Systems
What is an organ?
A group of different tissues that work together to perform a particular function
What is an organ system?
A group of organs working together to perform a particular function.
What is a tissue?
A group of similar cells that work together to carry out a particular function
Function of Palisade cells
Absorb light for photosynthesis
Function of roots
Absorb water and mineral ions for plant
Function of small intestine
Absorbs soluble food molecules
Function of large intestine
Absorbs water and forms faeces
Function of epidermis
Allows light through to reach palisade cells
Function of Spongy mesophyll
Contains air spaces to allow CO2 to diffuse throughout the leaf
What is the function of a muscle tissue?
Contracts to move
What is the function of an Epithelial tissue?
Covers some parts of the body
What is the job of epithelial tissue in the stomach?
Covers the inside and outside of the stomach
Function of Epidermal tissue
Covers the whole plant
Function of stomach
Digests food
Main organs in the digestive system
Glands Stomach Liver Small intestine Large intestine
Function of leaves
Main site for photosynthesis
What is the function of a glandular tissue?
Makes and secretes enzymes and hormones
What is the job of glandular tissue in the stomach?
Makes digestive juices to digest food
Examples of plant tissues
Mesophyll tissue Xylem and Phloem Epidermal tissue
What is the job of muscle tissue in the stomach?
Moves stomach wall to churn food
Function of liver
Produces bile
Function of glands in the digestive system
Produces digestive juices
Function of waxy cuticle
Protects leaf whilst allowing light through
Examples of Plant organs
Stems Roots Leaves
Function of stem
Supports the plant Helps transport water and nutrients from roots to leaves
Example of an organ system
The digestive system
Function of Xylem and Phloem
Transports substances around the plant
Structure of leaf (Top to bottom)
Waxy cuticle Upper epidermis Palisade mesophyll Spongy mesophyll Lower epidermis and guard cells Stomata
Function of Mesophyll tissue
Where most photosynthesis takes place