Registrati come insegnante
Unknown Story
Testo Storyboard
- Our bodies have to compensate for the lack of oxygen, by breathing faster and a higher heart rate. After our bodies get used to the higher altitudes it means our bodies have acclimated to the change.
- Most people hyperventilate to increase oxygen intake they can also experience dizziness, nausea, fatigue and headaches.
- Our bodies have adapted to the higher altitudes by releasing EPO's but since we have more than the average person this means women are more likely to experience slow fetal growth and the rate of fetal mortality is much more significant.
- EPO's stand from erythropoietin, this is a hormone released by the kidney's to stimulate bone marrow to produce red blood cells, to increase oxygen in blood.
- Due to the fact Tibetans have evolved scientist wanted to study the difference between the genomes with the Han Chinese. A particular gene was found within the Tibetan yet not their close relatives who lived in the lowlands.
- They believe the gene arose from natural selection. Natural selection is when an organism adapts to the environment for survival.
- Scientist wanted to compare how both groups have evolved to their environment, they conducted an experiment on levels of hemoglobin at different altitudes.
- The experiment showed that the Tibetans have evolved due to the fact that their hemoglobin levels are more regulated in high and low elevation. To continue, scientist wanted to find out what specific gene was the reason for their evolution.
- The Tibetans split from the Han Chinese about 3000 years ago, making the evolution of the Tibetan people the fastest human evolution ever documented.
- To sum it all up, Tibetan people have evolved due to the different environmental conditions. Their bodies have to evolve and change to continue living in higher altitudes.
Oltre 40 milioni di storyboard creati
Nessun Download, Nessuna Carta di Credito e Nessun Accesso Necessario per Provare!
