Cell organisation Flashcards
What are cells ?
basic building blocks that make up all living organisms
Specialised cells carry out particular function. The process by which cells become specialised for a particular job is called differentiation . Differentiation occurs during the development of a multicellular organism.
These specialised cells from tissues, which form organs which form organ systems. Large multicellular organisms have different systems inside them for exchange and transporting materials
What are tissues ?
a group of similar cells that work together to carry out a particular function. It can include more than one type of cell.
In mammals, examples of tissues include :
- Muscular tissue, which contracts to move whatever it’s attached to
- Glandular tissues, which makes and secrets chemicals like enzymes and hormones
- Epithelial tissue, which cover some parts of the body e.g. inside of gut
What are organs ? Example
a group of different tissues that work together to perform a certain function.
Example: stomach is an organ made of these tissues
- Muscular tissue, which moves the stomach wall to chum up the food
- Glandular tissue, which makes digestive juices to digest food
- Epithelial tissue, which cover inside and outside of the stomach
What is an organ system ?
Group of organs working together to perform a particular function.
For example: the digestive system breaks adown and absorbs food. Its made up of these organs
- Glands which produces digestive juices
- The stomach and small intestines which digest food
- the liver which produces bile
- The small intestine , which absorbs soluble food molecules
- The large intestine, which absorbs water from undigested food, leaving faeces
Organ systems work together to make entire organisms
