<span>Blood is a liquid and has cellular parts. The liquid contains substances such as proteins and lipids. The cellular constituents are erythrocytes (red blood cells), leukocytes and platelets.</span>
<span>The human population is increasing, so the likelihood of a mass extinction is also increasing.
The human population is increasing, and historically, as human population has increased, species have gone extinct. As human population increases, and also destroy more habitats to pay for higher standards of living, the probability of mass extinction increases. </span>
For observation and research. This is to analyse their features, structures, physiology and other possible mutations -genetic structures that have caused it to arrive at this rate.
Cancer cells are the result of those cells that deviate from the normal life cycle of a cell. These cancer cells refuse to die and rapidly increase in number due to the uncontrollable burst of cell division.
Multipolar neurons<span>. This is the </span>most common type of neuron<span>, with one axon and many dendrites.</span>
