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Chpter 14
Anatomy - - Circulation of the Blood
| Question | Answer |
|---|---|
| Arteries | Distribute blood through the body |
| Tunica Externa | Outer layer of veins and arteries made of connective fibers so they do not burst under pressure |
| Tunica Media | Smooth inner layer of veins and arteries |
| Tunica Intima | Most inner layer of veins and arteries made of a single layer of squamous epithelia cells |
| Endothelium | Squamous Epithelia cells in the tunica intima |
| Precapillary spincters | Guard entrances to the capillaries and determine how much blood will flow into each capillary bed. |
| Arteries and Arterioles | Distribute blood from the heart to capillaries |
| Venules and veins | Collect blood from capillaries and return it to the heart |
| Arteriosclerosis | Hardening of the arteries restricting the flow of blood through them. |
| Ischemia | Is the result of the flow of blood slowing down too much. |
| Necrosis | Tissue death |
| Gangrene | Necrotic tissue that has decayed |
| Atherosclerosis | Blockage of arteries by lipids and other matter (plaque) |
| Cerebrovasular Accident (CVA) | Brain aneurysm or stroke |
| Varicose veins | Are caused by blood pooling in the vein rather than continuing to the heart. |
| Hemorrhoids (piles) | Are varicose veins of the rectum. |
| Phlebitis | Vein inflammation |
| Thrombophlebitis | Acute phlebitis caused by clot formation. |
| Hepatic Portal Circulation | Route of blood flow through the liver. |
| Spleen, stomach, pancreas, gallbladder, and intestines | All blood flows into the liver from these organs and is filtered. |
| Two small umbilical arteries and a single umbilical vein | Make up the umbilical cord |
| Umbilical vein | Carries oxygenated blood tp the fetus |
| Umbilical Artery | Carries oxygen poor blood from the fetus |
| Dectus Venosus | Allows blood returning from the placenta to bypass the immature liver of the fetus and empty into the inferior vena cava |
| Foramen Ovale | Shunts blood from the right atrium directly into the left atrium |
| So-called hole in the heart is caused from? | The ductus arteriosus not closing properly upon the birth of the fetus. |
| The Ductus Arteriousus | Connects the aorta and the pulmonary artery in a fetus. |
| Blood pressure | Is the "push" of blood as it flows through the circulatory system. |
| Blood Pressure Gradient | The difference between any two blood pressures. |
| Blood volume,strength of heart contractions, heart rate, blood viscosity all do what? | Affect blood pressure. |
| Polycythemia | is caused when red blood cells increase beyond normal. Which in turn increases blood pressure and blood viscosity. |
| Peripheral resistance | Describes any force that acts against the flow of blood in a blood vessel. |
| Vasomotor mechanism | Adjustment of muscle tensioin in vessel walls to control blood pressure and thus blood flow. |
| Central venous pressure | Venous blood pressure within the right atrium and influences the pressure that exists in the large peripheral veins. |
| When feeling someones "pulse" you are actually feeling? | An artery expanding and then recoiling |
| Superficial Temporal Artery is located? | Front of the ear on the face. |
| Carotid Artery is located? | In the neck. |
| Axillary artery is located? | In the armpit. |
| Brachial Arter is located? | At the bend of the elbow. |
| Radial Artery is located? | At the wrist. |
| Femoral Artery is located? | In the groin. |
| Popliteal Artery is located? | Behind the knee. |
| Dorsalis Pedis Artery is located | On the front surface of the foot, below the bend of the ankle joint. |
| Hypertension occurs? | When Blood pressure is above 140/90. |
| Circulatory shock is? | Failure of the circulatory system to adequately deliver oxygen to the tissues. |
| Cardiogenic Shock is? | The heart can no longer pump blood effectively, blood flow to the tissues decreases or stops. |
| Hypovolemic shock is? | loss of blood in the blood vessels. |
| Anaphylactic Shock is. | Resulting from an acute allergic reaction called anaphylaxis. |
| Septic shock is? | Resulting from complication of septicemia, a condiction in which infectious agents release toxins into the blood. |