what is the flattened cells important in protection, that fits together like tiles?
Cells need to have different sizes and shapes since they all carry out different functions. For example, the nerve cell (neuron) is long and thin to allow the conduction of nerve impulses as efficiently as possible.
The size of the membrane pores depend on the proteins constituting the pore, thus different proteins may cause different pore sizes. So in most cases, yes, the "pores" will most likely be of different sizes.
cell are the basic building block of an organism .they are present every where in body.cells are different in shapes and size because they have to perform there functions accordingly where they are present.
Rough Endoplasmic reticulum (Rough ER)
Plant cells usually have a fixed shape while animal cells usually have an irregular shape. Plants do not have bones unlike animals and thus have a cellulose cell wall to cause the cell to have a fixed shape. Thus, cell shapes are different for each cell.
Cells are different shapes and sizes because they have different functions. The functions dictate the shapes and sizes.
Their different shapes help them to perform their various functions (jobs)
To perform different functions plant cells assume different shapes
Red blood cells all look like red blood cells. White cells have different shapes mainly because they have different functions.
Their different shapes help them to perform their various functions (jobs)
Cells need to have different sizes and shapes since they all carry out different functions. For example, the nerve cell (neuron) is long and thin to allow the conduction of nerve impulses as efficiently as possible.
The size of the membrane pores depend on the proteins constituting the pore, thus different proteins may cause different pore sizes. So in most cases, yes, the "pores" will most likely be of different sizes.
cell are the basic building block of an organism .they are present every where in body.cells are different in shapes and size because they have to perform there functions accordingly where they are present.
With cells, the rule of thumb is, structure defines function. Different cells throughout the body perform different functions. To perform these functions, they need different shapes. They all have the same DNA, but different "blueprints" are activated depending on where they are in the body.
Why are humans different shapes and sizes? Every living thing is different (More or less)
A nerve cell works with the nervous system to send messages from every part of your body to your brain to let you know if you are hungry or cold.
The R groups of the amino acids they contain.