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What are the differences between embryo and adult stem cells?
Adult stem cells are harvested from newborn's cord blood or human bone marrow while embryo stem cells come from the inner cell mass of a human embryo. No fetus is killed to use the stem cells, but the embryo cannot function and must be destroyed without a inner cell mass.
would you expect there to be more replication origins in developing embryo cells or in adult cells?
You would expect to find more replication origins in developing embryo cells compared to adult cells. This is because embryonic cells undergo rapid proliferation and need multiple origins of replication to ensure that DNA is replicated efficiently to support growth and development. In contrast, adult cells typically have a more stable and differentiated state, resulting in slower division rates and fewer replication origins.
Where at in the human body are stem cells?
There are adult stem cells and there are embryonic stem cells. Adult stem cells are found in many body tissues such as in the brain, neural stem cells, and in bone marrow. Also the embryonic stem cells, as you can tell by the name, are from the embryo which starts to develop into more recognizable specialized stem cells within three to four weeks after fertilization.
Undifferentiated sperm cells in the male embryo are called what?
Undifferentiated sperm cells in the male embryo are called spermatogonia. These cells undergo mitosis to produce more spermatogonia or differentiate into sperm cells during spermatogenesis.
Are Adult stem cells as useful as Embrionic stem cells?
Yes and No. The only big difference is the procedures used in harvesting adult stem cells is considered legal and safe. There's no need to kill a human embryo. Adult stem cells can be harvested from cord blood or human bone marrow. But embryonic stem cells are able to make more kinds of cells than adult stem cells.
Why might an adult human have more cells then a baby human?
The adult is bigger so it needs more cells than a baby.
What differences are between the onion root tip and whitefish embryo in size of the cells?
The cells in the onion root tip are typically smaller and more uniform in size compared to the cells in a whitefish embryo. Additionally, the onion root tip cells are actively dividing, while the whitefish embryo cells are undergoing differentiation and organ development.
What is difference between embryonic stem cells and adult stem cells?
An embryonic stem cell potentially can develop into ANY cell in the body theoretically without limit to replenish, and an adult stem cell is only able to mature into a specialised tissue cell from which tissue the cell is positioned.
Why muscle cell found in heart contain many more mitochondria than cells that store fat in adult humans?
Heart is very active than fat storing cells. It needs more energy
How many unipotent stem-cells are in An adult?
more than 200 cells
Which parts of the human body contain stem cells?
There are two kinds of stem cells: Embryonic and adult. 1. Embryonic stem cells are found in embryos. An embryo develops from a fertilized egg, or zygote, and after about 4-5 days it reaches the stage where 50-150 cells are colonized. This means that one fertilized egg divides into 50-150 cells, which are considered embryonic stem cells. Also, they are totipotent, meaning that they can reproduce indefinitely, and can give rise to any type of cell. 2. Adult stem cells, or somatic stem cells, can be found in adult tissues throughout the human body. As adult stem cells are tissue specific, they are in the already developed tissues. Some examples of where you can find stem cells in the human body: Bone marrow= hematopoietic (blood) stem cells which differentiate into blood cells endothelial stem cells = diff. into blood vessels (arteries, veins) mesenchymal stem cells = diff. into bone, cartilage, muscle, fat, fibres Cord blood= blood stem cells (similarly to bone marrow) (Because of this similarity they might be considered as an alternative for bone marrow transplant.) fat = adipose stem cells, also similar to bone marrow, as they can differentiate into bone, cartilage, fat, and muscle. Stem cells exist also in human skin, mammary glands, placenta, lungs, and the brain (in which neural stem cells may or may not exist; it is up for debate). The main function of adult stem cells is to replace damaged, or dying cells. They are pluripotent. Therefore, they too can reproduce indefinitely. However, while embryonic stem cells are able to develop into any kind of cell, adult stem cells are more limited. Umbilical cord blood considered to contain "adult" stem cells, since they are not part of the embryo anymore. The use of embryonic stem cells for research purposes is a highly debated question. However, research done on using adult stem cells is more widely accepted. Adult stem cells, found in bone marrow and in umbilical cord blood, are used routinely today. Fortunately, pluripotent (adult stem cells) can be "reprogrammed", and, as a result, they could be regarded as equivalent to embryonic stem cells. Just for an interest: deciduous baby teeth (milk teeth, which babies shed) can also be used as a source for adult stem cells. Stem cells, with the ability to develop into different cell types, can be found not only in humans, but also in plants and animals.
Where do you find blood stem cells?
Blood stem cells can either be found in a baby's umbilical cord or in a qualified donor's bone marrow. It might also be found in human embryo but the procedure in harvesting it is considered unethical. For more successful life stories about cord blood transplant, search it online.
