Answer:
The correct order is:
- <em>1. A hematoma forms at the </em><em>fractured area</em><em>.</em>
- <em>2. A mass of tissue containing </em><em>cells that produce collagen fibers forms</em><em>. These collagen fibers extend across the broken bone and attach the pieces back together.</em>
- <em>3. </em><em>Osteoblasts and osteoclasts</em><em> arrive at the fracture and begin to produce bone tissue there.</em>
- <em>4. The broken bone begins to take the shape it had prior to the fracture.</em>
Explanation:
After the fracture of a bone several events occur that involve the regeneration and remodeling of the broken bone:
- Hematoma in the fracture area is produced by the bleeding of the bone marrow, especially when it occurs in long bones.
- The collagen fibers are intended to initiate the repair process, trying to join the bone fragments that have separated. The purpose of this is to build a soft tissue base on which the new bone will grow.
- Osteoblasts and osteoclasts are responsible for the process of ossification and remodeling, respectively. Only a bone scar will remain at the fracture site.
- With the process of ossification and remodeling, the bone acquires the same shape it had before the injury.
This whole process is necessary for the morphological and functional recovery of a bone when it has suffered a fracture.
The inheritance of skin color genes is polygenic, meaning that many different genes are inherited and none are dominant, but rather they all work together to create a special blend of genes that you have. This is also influenced by environmental factors such as exposure to sun and similar.
Human skin color is a polygenic trait, which means that multiple gene loci are involved in its expression. It has been shown that there more than 350 genetic loci involved in determining skin color. Because of that, there is the enormous number of possible genotypes for the skin color and as a result, the phenotypes vary from the darkest brown to the lightest hues. Different populations have different allele frequencies of genes for human skin color, and the combination of these allele variations brings about complex and continuous variation in skin coloration. Natural skin color can change due to exposure to sunlight (becomes darker) and that is the way it adapts to intense sunlight irradiation (protection against the UV exposure).
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Answer:
Hello!
Explanation:
The instrument you're describing is called a Light microscope. I really hope this helps! Let me know if there's anything else you need.