Cells in Tissues , Organs & Systems Flashcards
name some examples of unicellular organisms
bacteria
amoeba
paramecium
how do unicellular organisms carry out their life organisms
these micro organisms carry out all of their life processes within one cell
how do multicellular organisms carry out their life organisms
the cells do do not carry out all the life processes within them
each cell is specialised to carry out different specific functions
what is the muscle cells function
to contract and relax
they must contain a large number off mitochondria to generate energy for movement
what is the nerve cells function
they are designed to transmit electrical impulses throughout the body therefore they should be long and must have an insulation layer
what is the definition of specialize
to take on a particular function and only perform that function.this is prevalent in multicellular organisms as we seen the different types of cells in multicellular organisms
what is the definition of a cell
the smallest unit of all living organisms. these come in different shapes and sizes carrying our different functions
what is the definition of a tissue
a group of cells that have the same structure and perform the same function
eg muscle tissue
connective tissue
nervous tissue
epithelialwhat is an organ
a group of tissues that work together to perform a single function
give an example of an organ
THE HEART
the heart is made of muscle tissue , connective tissue , nerve tissue and blood
all these tissues work together to pump blood around the body
other organs eye mouth liver stomach lungs
what is a system
a group of different organs that work together to perform a bodily function for the organism
give examples of systems
digetsive system is made up of may organs such as stomach , small intestine , mouth
these organs work together to digest food and absorb nutrients
digestive system circulatory system respiratory system excretory system reproduction system
what is an organism
an organism is made up of number of different system which all work together to keep the organism alive
what are macroscopic organisms
organism that are large enough to see with the naked eye such as humans , mammals
