Organisms Flashcards
Building an organisms
Cells —->Tissues——–> Organs ———> Systems
Small--------------------------------->Big
Tissues
Are groups of the same type of cell which perform a specific function
4 types of tissues on the body
Epithelium- skin
Connective tissue - fat, bone, cartilage, tendons and legimants tissue that connects things
Muscle tissue - groups of muscle cells
Nerve tissue - groups of nerve cells
Organs
Made up of different types of tissues which work together and they have a special job
Systems
A group of organs which work together to fulfill a major role in the body
Digestive system
Breaks down food into soluble chemical that can be used by your cells
Mechanical digestion
Breaking food into smaller bit of food
Respiratory
The respiratory system takes in air and extracts oxygen from it, this goes to the cells and the cells mitochondria uses it to make energy.
Chemical digestion
Breaking down complex chemicals into simpler ones
Circulatory
Why do we need it?
The circulatory system is vital as it is the sole way that nutrients, oxygen and waste products are transported to and from cells
Arteries
Carry oxygenated blood away from the heart, to the body
Need to be tough to take the high pressure. Cutting an artery is bad news!
Veins
Carry deoxygenated blood back to the heart after it has been taken to cells.
Veins contain valves to stop blood flowing backwards. They need these as they do not have the pressure applied by the heart
Capillaries
The smallest blood vessels. There walls are only one cell thick so that nutrients and waste can get through to and from cells.
Platelets
Help blood to clot
Plasma
Clear, yellowish liquid that carries all the other parts of blood
