Human (Homo sapiens) Cell Cutures
When model organisms cannot provide the information needed to answer a particular research question, biologists can turn to cultured human cells.
When model organisms cannot provide the information needed to answer a particular research question, biologists can turn to cultured human cells â€“ which are grown in Petri dishes, in the same way as bacteria. Since cultured cells carry out all basic biochemical functions, they are often used to model specific tissue functions and diseases. Primary cells are derived directly from living tissue â€“ such as blood, muscle, or nerve â€“ and can only be cultured outside the body for a limited number of cell divisions. Immortalized cells have acquired mutations that free them from a fixed life span and allow them to divide indefinitely in culture. Cultured human cells have been especially important in studying the genetic and biochemical events that convert a normal cell into a cancerous one.Embryonic stem cells have the ability to become any cell type, and therefore have enormous potential in terms of replacing damaged cells in the humans body.
cultured human cells, Homo sapiens, model, system, organisms, petri dishes, biochemical functions
- ID: 1715
- Source: DNALC.G2C
Model organisms share with humans many key biochemical and physiological functions that have been conserved (maintained) by evolution.
Petri dish, nerve, red blood cells.
A human is a complicated organism, and it is considered unethical to do many kinds of experiments on human subjects. For these reasons, biologists often use simpler “model” organisms that are easy to keep and manipulate in the laboratory.
Professor David Van Vactor explains that model systems are simple organisms that allow us to study and manipulate gene function and development.
Recombinant DNA technology has made it possible to test gene function in bacteria or cell cultures rather than animal models.
Professor David Van Vactor provides a simple explanation for why researchers work with model systems (model organisms).
Human origins expert Chris Stringer talks about the arrival of Homo sapiens and our possible ancestors.
Homo sapiens skull, front view
Homo sapiens skull, side view
It is increasingly clear that the nonneuronal brain cells called glia are intricately involved in the neuronal crosstalk at synapses.