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Circulatory Test
to help you study
| Term | Definition |
|---|---|
| Endocardium | Definition: Is a smooth layer of cells that lines the inside of the heart and is continuous with the inside of blood vessels. Function: Allows for smooth blood flow. |
| Pericardium | Definition: Is a double layered membrane, or sac, that covers the outside of the heart. Function: Lubricating fluid that that prevents friction and damage to the membrane as the heart beats or contracts |
| Myocardium | Definition: The thickest and most muscular layer, in the middle. |
| Diastole | Definition: The brief period of rest during the heart beat cycle |
| Systole | Definition: a ventricular contraction during the heart beat cycle |
| Arterioles | The smallest branches of arteries that join with capillaries. |
| Veins | are blood vessels that carry blood bact to the heart. carries deoxygenated blood ( except for the pulminary veins) |
| Arteries | carry blood away from the heart. carries oxygenated blood except in the pulminary artery |
| capillaries | connect arterioles venules ( small branches of veins) they have thin walls that allow oxygen and nutrients to enter the cells, and carbon dioxide and metabolic processes to enter the capillaries |
| plasma | what blood is made up of, 90% water, with several dissolved, or suspended, substances. contains blood proteins/nutrients |
| Hemoglobin | complex protein composed of the protein molecule called globin and the iron compound heme. it carries both oxygen and CO2 |
| Aorta | the main artery of the body that supplies oxygen to the brain, arms, torso, and legs, supplies oxygenated blood |
| Erythrocytes | red blood cells, produced in the red bone marrow. main function is to carry oxygen and contains hemoglobnin |
| Thrombocytes | pieces of cells that lack nuclei, formed in the bone marrow. they are important beacause they help clot, which helps stop excessive bleeding. they collect at the cut and form a sticky plug and release seratonin (scab) |
| Leukoctes | WBC that are formed in the bone marrow, and lymph tissue. usually last 3-9 days. their main function is to prevent and fight infection |
| Hemophilia | hereditary blood disorder where the body doesnt have enough von willebrand protein that helps with clotting, therefore blood does not clot causing excessive bleeding |
| aneurysm | a sac like formation on an artery wall that is filled with blood, if it ruptures it can cause death, it is caused by disease defects and injuries |
| leukemia | a malignant disease of the bone marrow or lymph tissue. it results in the in a high number of immature white blood cells. |
| phlebotomist | is an integral member of the medical laboratory team whose primary function is the collection of blood samples from patients by venipuncture or microtechniques |
| cardiologist | deals with disorders of the heart. specialize in diagnosing and treating diseases that relate to the cardiovascular system |
| hematologist | someone who studies blood, treats disease of blood, bone marrow and lymphatic system. they deal with anemia, clotting, ect. |
| electrocardiogram | a record of electrical activity in the heart, is used to diagnose disturbances of conduction, myocardial infarction,metabloic disorder, ect. |
| # of cells in cubic ml of blood | 4.5- 5.5 million : erythrocytes 5,000-9,000: luekocytes thrombocytes: 250,000-400,000 |
| blood type giving | A,B, AB, O. |
| conductive pathway | sinoatrial node, atrialventicular nodes, bundle of his, right/ left branch, and purkinjie fibers |
| amount of blood in the body | adult: 4-6 qt |
| red color of blood | is oxygenated blood |
Created by:
danielleh13
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