Dermal fibroblast wound site perish. Without fibroblasts, the wound site cannot regenerate extracellular matrix and epidermis skin cells cannot proliferate over the wound site. Therefore, without dermal fibroblasts the skin cannot properly recover from injury. Yet, by differentiating mesenchymal stem cells from other regions of the body and injecting them into the wound site, scientists can restore dermal fibroblasts to burned regions of the body. By restoring fibroblasts to the burned regions, the body can restore the ECM within the wound site and recover from the injury. As noted "The injured dermis is also repaired by the recruitment and proliferation of fibroblasts
Effect of spaceflight on the human body such a design, pressurization of the torso could be achieved mechanically, avoiding mobility reduction associated with pneumatic pressurization. Human physiology is adapted to living within the atmosphere of Earth, and a certain amount of oxygen is required in the air we breathe. If the body does not get enough oxygen, then the astronaut is at risk of becoming unconscious and dying from hypoxia. In the vacuum of space, gas exchange in the lungs continues as normal but results in the removal of all gases, including oxygen, from the bloodstream. After 9 to 12 seconds, the deoxygenated blood reaches the brain,