Answer:
Hematopoietic stem cells
Explanation:
These hematopoietic stem cells gives rise to the other blood cells in the bone marrow and the process is known as hematopoiesis. It occurs in the red bone marrow.
Bone marrow is the place where new blood cells are produced. It is the tissue comprising center of large bones and contains two types of stem cells: hematopoietic and stromal.
<span> The amount of </span>energy<span> at each </span>trophic level<span> decreases as it moves through an ecosystem. </span>
Secretion is the process in urinary system that leads to the elimination of excessive substances like sodium and potassium in the urine.
Secretion is the process of transfer of waste substances from the blood capillaries into the renal tubule. The waste substances can be ions like sodium, potassium, or hydrogen. The segment of the renal tubule that performs secretion is the proximal convoluted tubule.
Urinary system is also called the excretion system where all the waste ions, minerals and water is transferred out from the body in the form of urine. Kidneys are the key organs of the urinary system. They filter out the impurities from the blood and excrete it out through the urethra by a process called micturition.
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Macromolecules.
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We are now experiencing enhanced greenhouse which overly warms the planet and destroyed the atmosphere. <span />
