- transportation: delivers oxygen from lungs to cells, moves carbon dioxide from cells to lungs, carries nutrients/waste products/hormones to destinations
- regulation: maintain steady pH, distributes heat/adjusts body temperature
- protection: forms seals/clots to prevent blood loss, white blood cells fight disease
components of blood:
 |
| plasma: liquid portion of blood formed elements: consist of many types of blood cells erythrocytes= RBCs leukocytes= WBCs |
- RBCs- deliver oxygen
- WBCs- fight foreign bodies
- platelets- clot
origin & development of blood cells:
- hemopoiesis: process of making formed elements in red bone marrow
- hemostasis: stoppage of bleeding
- thrombus: small clot that forms in an unbroken vessel & dissolves spontaneously
- embolus: clot that breaks off & travels through cardiovascular system
- RBCs are dismantled in spleen/liver/red bone marrow
- the hormone erythropoietin stimulates erythropoiesis (red blood cell formation) in red bone marrow
- leukocytosis: above average/increase in WBC count
- leukopenia: below average/reduction in WBC count
- agglutination: RBCs clump together
- hemolysis: RBSs burst
- polycythemia: disorder characterized by too many RBCs
- anemia: condition of blood in which there are too few RBCs
- leukemia: red bone marrow cancers in which abnormal white blood cells multiply uncontrollably
- neutrophil: most abundant type of WBC in mammals
- monocyte: WBC w simple oval nucleus and clear, grayish cytoplasm
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