Cell Diversity
Tissue: Group of similar cells with a shared function
Plant Tissue
1) Ground Tissue; unspecialised cells that make up the bulk of the plant
- Stores nutrients such as starch, in storage organs like the stem and leaf
- In leaves ground tissue is the site of photosynthesis
- In roots it functions in transport of water and minerals to the vascular tissue in the plant
2) Vascular Tissue; functions in transport of substances around the plant
- Xylem tissue transports water from the roots to the aerial parts of the plant
- Phloem tissue transports food around the plant, movement can be upwards or downwards depending on where the food is needed
Animal Tissue
1) Muscular tissue; 3 distinct types
- Skeletal muscle, voluntary muscle which we have conscious control of
- Smooth muscle, muscle in the arteries, veins and in the digestive system. No conscious control of it.
- Cardiac muscle, Heart muscle which is also involuntary
2) Nervous Tissue; highly specialised cells which are capable of sending electrical impulses, these messages travel around the body of the animal and enable quick response
Tissue culture: The growth of tissue and/or cells outside of the body
- Used in Cancer treatment, Skin graphs and InVitro Fertilisation
Organs: Group of tissues joined together to carry out a specialised function
Animal Organs
e.g. Heart, Liver, Lungs etc.
Plant Organs
e.g. Root, Stem, Leaf, Flower etc.
Organ Systems: Group of organs which work together to carry out a linked function
Animal Systems
e.g. Circulatory system, Digestive system, Respiratory system
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