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Q. What are blood stem cells?
Stem cells are undifferentiated cells able to differentiate into other kinds of specialized cells.
The stem cells of the bone marrow originate the differentiated blood cells According to stimulus from specific growth factors the stem cells are turned into red blood cells, megakaryocytes and leukocytes (cells that form platelets). Research shows that stem cells of the bone marrow can also differentiate into muscle, hepatic cells and nervous.
Cortex can be described as follows 1) The outer part of the organ, such as, the adrenal cortex, which produces many steroidhormones; 2) in plants, the area of the stem or root
Explain in detail about Male Reproductive System The male reproductive organ consists of the following: A pair of testes, held in scortum; produces spermatooa and testoster
Nutrition of Embryo Sac The morphology of the ovule suggests that the chalazal end is the main route for the entry of nutrients. The funicular vascular supply ends at the bas
Coronary Arteries The right coronary artery originates form the right aortic valvular cusp, its, SA nodal branch supplies the SA node and AV nodal branch supply the AV nod
What are the protective structures of the central nervous system present in vertebrates? In vertebrates the brain and the spinal cord are protected by membranes, the meninges,
Population Distribution - Population Parameters and Regulation Dispersion or distribution refers to the pattern of distribution of individuals of a population. As shown in Fig
What is an antigen? Antigen is any substance, particle or infectious agent known as foreign to the body. The contact of the antigen with the body promotes a defense reaction ag
pour plate method
An enhance in parasympathetic discharge to the heart leads to A. An enhance in the conductance of F-channels in SA node cells. B. An enhance in the conductance of potassium
What is the difference between taeniasis and cysticercosis? Taeniasis is the parasitic disease caused by the adult tapeworm installed within the human intestine. Cysticercos
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