In the human embryo, the first site of blood formation is the yolk sac. Later in embryonic life, the liver becomes the most important red blood cell-forming organ, but it is soon succeeded by the bone marrow, which in adult life is the only source of both red blood cells and the granulocytes. Their job is to transport oxygen to the body's tissues in exchange for carbon dioxide, which is carried to and eliminated by the lungs. Red blood cells are formed in the red bone marrow of bones. Stem cells in the red bone marrow called hemocytoblasts give rise to all of the formed elements in blood. Erythroid (red blood) cells are the first cell type to be specified in the postimplantation mammalian embryo and serve highly specialized, essential functions throughout gestation and postnatal life. The existence of 2 developmentally and morphologically distinct erythroid lineages, primitive (embryonic) and definitive (adult), was described for the mammalian embryo more than a century ago. Cells of the primitive erythroid lineage support the transition from rapidly growing embryo to fetus, whereas definitive erythrocytes function during the transition from fetal life to birth and continue to be crucial for a variety of normal physiologic processes. Over the past few years, it has become apparent that the ontogeny and maturation of these lineages are more complex than previously appreciated. In this review, we highlight some common and distinguishing features of the red blood cell lineages and summarize advances in our understanding of how these cells develop and differentiate throughout mammalian ontogeny.
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Explanation:
A staggering 3.48 billion people currently use social media, representing a 9% increase from 2018. In other words, about 366 million people just started using social this year. The biggest benefits I see from social media is that the communication development has improved over many years. Another advantage of social media marketing is the ability to build your websites.
A way social media can enhance your life: It is an effortless way to connect with the like-minded people. ... Regardless of location and religion, social networks are helpful in reviving and preserving relationships with other people. It has become easier for us to connect with business people, family and friends.
I hope this can help sorry if I am wrong tho.
Answer: you grab it. Then you grab the steam break it grab the yellow stuff (the peal) the you pull all of them down. And there you go. Enjoy :)
Answer:
1. C
2. D
3. A
4. B i think
5. Do breathing exercises.
Six and seven I didn't read the article so I can't help you with those but I hope the other answers are correct!
The answer is B, since the question is asking for complete agreement between the partners.
