ASSALAMMU'ALAIKUM WARAHMATULLAH ..HIWABARAKATUH..SALAM RAMADHAN AL MUBARAK !!!!
TODAY I'M GOING TO SHOW YOU WHAT I'VE LEARN IN MICROBIOLOGY CLASS....
p/s; Microbiology is the study of microscopic organisms, either unicellular (single cell)
PART 1..RED BLOOD CELL
Red blood cells, or erythrocytes, are the most common type of blood cell and the vertebrate organism's principal means of delivering oxygen (O2) to the body tissues via theblood flow through the circulatory system.[1] They take up oxygen in the lungs or gills and release it while squeezing through the body's capillaries.
These cells' cytoplasm is rich in haemoglobin, an iron-containing biomolecule that can bind oxygen and is responsible for the blood's red color. The cell membrane is composed of proteins and lipids, and this structure provides properties essential for physiological cell function such as deformability and stability while traversing the circulatory system and specifically the capillary network.
In humans, mature red blood cells are flexible and oval biconcave disks. They lack a cell nucleus and most organelles, in order to accommodate maximum space for haemoglobin. Approximately 2.4 million new erythrocytes are produced per second.[2] The cells develop in the bone marrow and circulate for about 100–120 days in the body before their components are recycled by macrophages. Each circulation takes about 20 seconds. Approximately a quarter of the cells in the human body are red blood cells.[3][4]
Red blood cells are also known as RBCs, red cells,[5] red blood corpuscles (an archaic term), haematids, erythroid cells or erythrocytes (from Greek erythros for "red" andkytos for "hollow vessel", with -cyte translated as "cell" in modern usage). Packed red blood cells (pRBC) are red blood cells that have been donated, processed, and stored in ablood bank for blood transfusion.
THIS IS OUR RED BLOOD CELL IN 3 CONDITION.... :D
HYPERTONIC = THE CONCENTRATION OF WATER OUTSIDE THE CELL IS LOWER THAN THE CONCENTRATION OF THE RED BLOOD CELL. HENCE WATER MOLECULES DIFFUSE OUT BY OSMOSIS CAUSING THE RED BLOOD CELL TO SHRINK
ISOTONIC = THE CONCENTRATION OF WATER OUTSIDE THE CELL IS APPROXIMATELY THE SAME WITH THE CONCENTRATION OF WATER INSIDE THE CELL. HENCE, WATER MOLECULES DIFFUSE OUT IS EQUAL TO WATER MOLECULE DIFFUSE INTO THE CELL.
HYPOTONIC = THE CONCENTRATION OF WATER OUTSIDE THE CELL IS HIGHER THAN THE CONCENTRATION OF WATER INSIDE THE CELL. HENCE, WATER MOLECULES DIFFUSE INTO THE CELL CAUSING THE CELL TO BECOME PLASMOLYSED.
http://www.youtube.com/watch?v=6myuX4ubWRQ LIFE OF OUR BLOOD IN CARTOON WAY.....
NEXT.........
PART 2: OUR WHITE BLOOD CELL :3
http://www.youtube.com/watch?v=JnlULOjUhSQ WHITE BLOOD CELL
phagocytosis
LAST BUT NOT LEAST,
PART 3: PLATLETS....
PLATLETS IS IMPORTANT FOR BLOOD CLOTTING....
Platelets, or thrombocytes (from Greek θρόμβος, "clot" and κύτος, "cell"), are small, disk shaped clear cell fragments (i.e. cells that do not have a nucleus), 2–3 µm in diameter,[1] which are derived from fragmentation of precursor megakaryocytes. The average lifespan of a platelet is normally just 5 to 9 days. Platelets are a natural source of growth factors. They circulate in the blood of mammals and are involved in hemostasis, leading to the formation of blood clots.
If the number of platelets is too low, excessive bleeding can occur. However, if the number of platelets is too high, blood clots can form (thrombosis), which may obstruct blood vessels and result in such events as a stroke, myocardial infarction, pulmonary embolism or the blockage of blood vessels to other parts of the body, such as the extremities of the arms or legs. An abnormality or disease of the platelets is called a thrombocytopathy,[2] which could be either a low number of platelets (thrombocytopenia), a decrease in function of platelets (thrombasthenia), or an increase in the number of platelets (thrombocytosis). There are disorders that reduce the number of platelets, such as heparin-induced thrombocytopenia (HIT) or thrombotic thrombocytopenic purpura (TTP) that typically cause thromboses, or clots, instead of bleeding.
Platelets release a multitude of growth factors including platelet-derived growth factor (PDGF), a potent chemotactic agent, and TGF beta, which stimulates the deposition of extracellular matrix. Both of these growth factors have been shown to play a significant role in the repair and regeneration of connective tissues. Other healing-associated growth factors produced by platelets include basic fibroblast growth factor, insulin-like growth factor 1, platelet-derived epidermal growth factor, and vascular endothelial growth factor. Local application of these factors in increased concentrations through Platelet-rich plasma (PRP) has been used as an adjunct to wound healing for several decades.
