Some people believe that the sound you hear when putting a seashell to your ear is that of your blood rushing though the blood vessels in the ear, but that is not true. It is the ambient noise that's produced when the air entering the seashell bounces about in the hollow cavity of the...
Surrounding each alveolus are small, thin-walled blood vessels called pulmonary capillaries. Between the capillaries and the alveolus is a thin wall (about 0.5 microns thick) through which various gases (oxygen, carbon dioxide and nitrogen) pass. When you inhale, the alveoli expand and take in o...
Defining an Inlet In an effort to get everyone on the same page, let’s start by defining what an inlet (often referred to as an "entrance" or "pass") is for the mariner. According to Webster, an "Inlet" is: "A narrow water passage between peninsulas or through a barrier island le...
To comprehend how we can gain access to such precise numbers, we have to ask ourselves: how does a breathalyzer work? What do those figures mean? And how do police officers find out if someone they suspect has been drinking is actually legally drunk? Many officers in the field rely ...
Coffee:Caffeinecan constrict blood vessels and help withheadacheas well as energy. However, since coffee is also a diuretic, it is important to increase your water intake along with it. Painrelievers:Over-the-countermedications such asacetaminophenmay not cure the hangover, but they will help wit...
Where does our water come from? There's often discussion in the news of the world's dwindling water supply, but this isn't entirely accurate. The amount of water isn't diminishing, but the demand for it is steadily increasing. Some scientists believe that the world's population, currently...
" This to me, at that time is not ordinary six words. It is like when I catch a cold, pass to a cup of warm water. My friend, I haven't replied in a loud: "good!" Was carefully for me to explain. Looking at her kind eyes, modest attitude, I like the spring breeze brings ...
How is water transported through the human body? How does the human body use electricity? How does the reproductive system work with the circulatory system? How does blood become deoxygenated? How does the vasoconstriction of blood vessels that supply the intestines affect the body? How do cells...
For comparison, even an oil tanker only contributes about 1% of the carbon footprint air freight does when weighed in grams per cargo mile. And the trend isn’t going anywhere. By 2050, the Environmental and Energy Study Institute anticipates air travel will have tripled in its carbon foot...
Xylem is one of the 2 vascular tissues in plants. Its main function is to aid the translocation of water and minerals from the soil to all parts of the plant. Xylem is otherwise known as the tracheary element. It possesses xylem tracheids and xylem vessels....