The CT cells are grouped into fixed (resident) cells and transient (wandering) cells, resident cells have developed and remain within the connective tissue, where they perform their functions, these fixed cells are stable, long-lived...
White blood cells have nuclei, which distinguishes them from the other blood cells, the anucleated red blood cells (RBCs) and platelets, WBCs are also called leukocytes or leucocytes, they protect the body against both...
White Blood cells form a special system for combating the different infectious & toxic agents by actually destroying invading agents by phagocytosis, and by forming antibodies and sensitized lymphocytes to destroy the invader. Our...
Human immune system Some organs of the immune system are called lymphoid organs, because they are a home to lymphocytes which are the main components of the lymphatic system, The parts of the immune...
The contraction of right side of the heart occurs at the same time of left side contraction , Therefore , the pumping of deoxygenated blood from the right ventricle and pumping of the oxygenated...
Blood is the principal medium in the transport process , Its colour is red viscous liquid , PH equals 7.4 ( weak alkaline ) , Volume is 5 – 6 liters of blood on...
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