Living things are highly organized and structured, following a hierarchy that can be examined on a scale from small to large.
atom
is the smallest and most fundamental unit of matter.
Organelles
are small structures that exist within cells
Cells
All living things are made of cells.
Cells combine to make tissues.
Smallest unit of life
Organs
are collections of tissues grouped together performing a common function.
organ system
consists of functionally related organs.
population
All the individuals of a species living within a specific area are collectively
community
sum of populations inhabiting a particular area
ecosystem
consists of all the living things in a particular area together with the abiotic components.
biosphere
At the highest level of organization, the biosphere is the collection of all ecosystems, and it represents the zones of life on earth. (Boundless Biology, 2019
How many cells make up an average human being?
The average human being is composed of around 100 Trillion individual cells
It would take as many as 50 cells to cover the area of a dot on the 66-39 letter "i"
What type of cell can no longer regenerate once used up?
neuron
What type of cell can carry Oxygen and supplies it through the body