During pregnancy, the form of estrogen that predominates is produced by the placenta, and may be useful in prenatal screening is Human chorionic gonadotropin hormone (hCG).
Human chorionic gonadotropin hormone (hCG) hormone is only produced during pregnancy. It is produced predominantly in the placenta. Levels of the hormone hCG, found in the mother's blood and urine, rise greatly during the first month of pregnancy.
hCG can detect the pregnancy ten days after conception. It is the earliest method to check the pregnancy. It also helps to detect the correct age of the fetus and the problems related to the pregnancy like ectopic pregnancies, miscarriages etc.
Learn more about the Human chorionic gonadotropin hormone on:
brainly.com/question/9544017
#SPJ4
Answer:
Kupffer cells, also known as stellate macrophages due to their particular structure while viewed under a microscope, were first identified by scientist Karl Wilhelm von Kupffer, after whom the cells were named, in 1876.
These cells, whose origin is in the yolk sack during fetal development, later on move to the liver where they will stay and further differentiate into their mature versions.
These cells are part of the liver cells, and are found particularly on the walls of the sinusoids, where they perform their two most important tasks. First, these cells are part of the immune system, as they are essentially macrophages. However, their role is pretty unique, as they are responsible not just for phagocytosis of invading bacteria, and other pathogens, and initiating immune responses, but also, this cell plays a role in decomposing red blood cells who are dying, and taking up the hemoglobin from them to further break that into reusable globin, and the heme group, from which iron is further extracted to be re-used and also to create bilirrubin, a part of bile.
Finally, these cells have been found to be connected to hepatic cirrhosis, as in their process of detoxifying ethanol, they produce toxins that force the liver cells to produce collagen, and thus to become fibrous.
Answer:
the lymphatic system only carries fluid away from tissues.
Explanation:
