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What two things help the blood in veins return to the heart?
The blood in veins is at a lower pressure than it is in the arteries. The lower pressure makes for challenges getting that blood back to the heart. As there is less force (pressure) in the veins, blood would pool in the lower parts of the body if there were not mechanisms to prevent that. There are three different things that help blood get back to the heart. The three mechanisms are: venous valves, muscular pumps, and the respiratory pump.
What three things affect airpressure?
Heat, number of molecules, atmospheric pressure and volume Volume * Pressure = molecules * molar gas constant * Heat
What are three things that can increase your blood pressure?
Poor diet, stress, and smoking.
What are the three main things that affect the weather?
The three main things that affect the weather are air temperature, air pressure, and humidity. Changes in these factors can result in different weather conditions such as rain, snow, or sunny skies.
How does your pulse and blood pressure work?
Your "pulse" is how fast your heart is beating, and is measured in how many beats in a minute. This is controlled by several things. One is how healthy your heart is (if you have a strong heart, i.e. from exercising, your heart does not have to beat as often for the same effect and therefore your pulse will be lower). If you are exercising, your pulse or heart rate will increase to meet the increasing oxygen demands of your muscles. Also, if you are afraid, stressed out, or angry, your sympathetic nervous system stimulates the "flight or fight" response which increases your heart rate for the same reason. Your Blood pressure, however, is how much pressure is actually being exerted on the insides of your blood vessels when your heart beats. This is affected by three things: the size of your blood vessels, the strength of your heart, and the amount of fluid or blood in your bloodstream. The flight or fight response can affect these things by causing your heart to beat harder, therefore exerting more pressure, and by causing your blood vessels to constrict, or narrow. Both of these things raise your blood pressure. Again, exercise also causes your heart to beat harder and raises your blood pressure. Nicotine causes your blood vessels to constrict and this increases blood pressure. If you are dehydrated or bleeding severely, your blood pressure goes down because there is less fluid in your blood stream. Your body will compensate for this by increasing your pulse rate and constricting your blood vessels. The numbers you see in a blood pressure represent your systolic Blood Pressure (the first and usually higher number) and your diastolic Blood Pressure. The systolic blood pressure is the pressure exerted on your blood vessels when your heart pumps. This is why this pressure is higher. The diastolic Blood Pressure is the pressure in your blood vessels in between heart beats. Review: Related Links for more info.
What are three types of blood tubes Which one carries blood at the lowest pressure?
The three types of blood vessels are the capillaries, arteries, and veins. The veins are the ones that have the lowest pressure.
Blood pressure can be affected by a vessel diameter b blood viscosity c turbulence uneven flow of blood due irregular surface of inner blood vessel wall?
Blood Pressure can be affected by all three factors. If the vessel diameter increases (vasodilation) Blood Pressure can be lowered. Blood Viscosity can also have an affect on blood pressure, the more viscous (thicker) the blood is, the slower it will flow through the body. Finally, irregular surfaces of the blood vessel wall can cause them to catch or become stuck, which ultimately slows blood flow, reducing blood pressure!
What 3 things affect the behavior gas?
Temperature, pressure, and volume are the three main factors that affect the behavior of gases. Changes in these properties can result in variations in the volume, pressure, and temperature of the gas.
What are the three that affect solubility?
Pressure, type of solvent, temperature
What three things blood contains?
Blood contains four things: white blood cells, red blood cells, platelets and plasma.
What is the other name for hypertension?
The common name for hypertension is high blood pressure. To be diagnosed with high blood pressure, a person typically has three or more readings of 140/90 or higher.
What three things affect the frequency of a sound wave?
The three things that affect the frequency of a sound wave are the source of the sound (vibration frequency), the medium through which the sound wave is traveling (speed of sound in the medium), and the relative motion between the source of the sound and the observer (Doppler effect).
