2- Tissues And Organs Flashcards
What is a tissue?
A group of cells with similar structure and function
What is a multicellular organism?
An organism made up of many different cells which work together. Some cells are specialised for different functions
What do animal tissues include?
Muscle tissue (brings movement) Glandular tissue (produce substances) Epithelial tissue (covers some parts of the body)
What does plant tissue include?
Epidermal tissue (covers the plant)
Mesophyll (can photosynthesise)
Xylem and phloem (transport substances)
What organ uses all three kinds of tissue?
What does each tissue do in it?
The stomach
Muscle tissue- churns stomach content
Glandular tissue- produces digestive juices
Epithelial tissue- covers the outside and inside of the stomach
What is the four stages in which cells build up? And an example
Cells - tissues - organs - organ systems
Nerve cells - nerve tissue - spinal chord/brain - nervous system
What are the three plant organs which contain all four tissues?
And there jobs
Stem - transports substances around the plant
Root - consume water and minerals
Leaves - the main organ for photosynthesis
In the leaf, what do the tissues do?
Epidermal tissue - covers the plant
Mesophyll - (palisade and spongy) responsible for most of the photosynthesis
Xylem - transports water and minerals
Phloem - transports other substances
Why is the digestive system so important?
Food must be changed from insoluble to soluble molecules. Only then can the soluble molecules be absorbed into the blood
What does the digestive system include and what are each parts role?
Glands (pancreas and salivary) which produce digestive juices
Stomach and small intestine is where digestion occurs
Small intestine also the place where the absorption of soluble food occurs
Liver produces bile
Large intestine is where water is absorbed from undigested food, producing faeces.
