Cell (from Latin cella, meaning "small room")
Basic structural, functional, and biological unit of all known living organisms.
The smallest unit of life
Called the "building blocks of life"
Study of cells is called cytology
The cell is the smallest unit of life that can maintain and perpetuate itself
All living things are composed of cells
All cells arise from other cells
Size of Cells
Cells grow in size and volume
Cells are small (in the order of 6 micrometers)
Cells size is restricted because of moving material in and out of the cell
Oxygen comes from our lungs while the rest comes from our diet. Carbon dioxide is exhaled by our lungs and the remainder leave the body by urine.
All living cells have fluid surrounding them. What about our cells? How about the outer layer of skin? The outer most layer is made of dead cells because they are in contact with the air.
Organisms, such as humans, are multicellular, (humans have an estimated 100 trillion cells; a typical cell size is 10 µm, a typical cell mass 1 nanogram).
The largest known cell is an ostrich egg.
Each cell is at least somewhat self-contained and self-maintaining: it can take in nutrients, convert these nutrients into energy, carry out specialized functions, and reproduce as necessary.
Each cell stores its own set of instructions for carrying out each of these activities.
There are two types of cells, eukaryotic and prokaryotic.
Prokaryotic cells are usually singletons, while eukaryotic cells are usually found in multi-cellular organisms like humans.
Please review the following:
Please provide additional resources that support the accuracy of this video.
Please prepare a presentation and submit for discussion with your mentor a demonstration that explains your understanding of this material. Please include why cells tend to be spherical in shape and what limits the size of cells.