Phlebotomy is a technique in which a needle is temporarily inserted into a vein to provide venous access for venous blood sampling.<span> [1, 2, 3] </span><span> Veins have a three-layered wall composed of an internal endothelium surrounded by a thin layer of muscle fibers, which in turn is surrounded by a layer of connective tissue.
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Answer:
Hereditary factors do not combine but are passed on in the same form they were inherited.
Explanation:
Answer:
Explanation:
Respuesta:Presentan una gran variedad de peligros, estos dependen de que tipo sean los residuos contaminantes, ya que varían en muchas características como los tóxicos, patogénicos, etc.
Como se puede observar existen muchos tipos de basuras y con diferentes características diferentes que llegan a variar por su peligrosidad u toxicidad.
Answer:
Because of the chemical and structural nature of the phospholipid lipid by layer the lipid soluble molecule can just pass the lipid membrane and some small molecules can also pass freely.
Explanation:
as we know that the homeostasis is an important process for a living cell to maintain it self so for the the exchange of materials between the external and internal environment is must so for that it exchange material with the outside environment of the cell.as the cell membrane is semipermeable(mean allow some molecule to pass(lipid soluble) and not others(lipid non soluble) to pass through the membrane.the cell membrane is selectively permeable due to its nature and chemical composition the chemical composition is lipid and phosphate and glycerol(head) with fatty acid that may b saturated or unsaturated(tail).so finally all those molecule which are polar can not pass through the membrane and non polar can pass the membrane.The size of the molecule is also a factor on which the permeability depends.
