Science

Refine Search

What happens when blood reaches the lungs?

The air exchange in the lungs is important to the body's overall functioning. Oxygen that enters the blood in the lungs is obtained through air that is breathed in, or inhaled. The National Heart, Lung and Blood Institute explains that inhaled air travels down the windpipe, through the bronchial tubes and into small air sacs called alveoli. Small blood vessels called capillaries surround the alveoli. Oxygen passes through the thin walls of the alveoli and into the blood in the capillaries. A protein in the red blood cells called hemoglobin helps to transport the oxygen. At the same time, ..

Continue Reading

What is the largest animal in the rainforest?

African forest elephants are herbivores with straight downward tusks and narrow, long mandibles. They commonly feed on bark and leaves, but the main part of their diet is fruit. Due to the extreme demand for ivory and the resultant poaching, the population of African forest elephants reached a critical level in the 1990s. Over the years, their numbers have fallen from around 700,000 to under 100,000, with half the population that remains found in Gabon.

Continue Reading

What is Venus named after?

Vulcan was one of the most infamous and disliked gods, but Jupiter gave Venus to Vulcan in thanks for thunderbolts. Legends of Venus' birth suggested she was the daughter of Jupiter and Dione, or that she came from the foam of the sea, which carried her to the isle of Cyprus.

Continue Reading

How cold is liquid nitrogen?

Liquid nitrogen is made of pure nitrogen. It must be kept in specially insulated containers in freezing units to prevent damage to anything nearby and to maintain the liquid's temperature. Vacuum-sealed containers can more easily maintain the temperature of liquid nitrogen. Liquid nitrogen was first discovered in 1883 by a pair of Polish scientists at Jagiellonian University.

Continue Reading

What can we do to prevent ozone depletion?

Green Diary explains that these ozone-depleting substances make this protective coat of the earth thinner and allow harmful ultraviolet rays to enter. Ultraviolet rays can cause cataracts, skin cancer and damage to plants.\nAccording to Green Diary, one of the simplest ways to help prevent ozone depletion is to minimize the use of private vehicles. Emissions from vehicles cause smog and help deplete the ozone layer. Riding public transportation, carpooling, biking and walking are some effective alternatives. Additionally, switching to vehicles that have electric, zero-emission or hybrid engine..

Continue Reading

What are the measurements for the maneuverability test in Ohio?

The driver will need to steer to the right or the left marker following the examiner's rules. Then the driver will need to watch where the rear bumper meets the marker and stop there. Next, the driver will have to back up past the marker and straighten the car to fit it through the box. When this happens, the driver will be parallel to both marks and will have demonstrated the ability to parallel park.If the driver touches or knocks over a marker, then he or she will have to go back to the beginning and start again. The test cannot be fully completed until the vehicle and the driver have ..

Continue Reading

What are some general characteristics of the phylum Nematoda?

Roundworms are skinny worms tapered at both ends. Most of the 12,000 identified species look very much alike and are hard to distinguish. They live almost everywhere including freshwater and saltwater and can be herbivores, carnivores or omnivores. The help the environment by aiding in decomposition by breaking down organic matter.Nematodes breath using the entire surface of their skin; therefore, they lack a respiratory system. Most species have separate sexes while others are hermaphrodites. All species have a mouth and anus, giving them a complete digestive system. They all have teeth which..

Continue Reading

What is the largest big cat?

Amur tigers are considered an endangered species. Most of the 400 to 500 Siberians remaining as of 2014 live in the forests of eastern Russia. A small number also inhabit China and North Korea. Siberian tigers are very light orange and have few stripes. This coloration allows them to blend in with their snowy habitat. Compared to other tigers, Siberians have thicker fur and a heavier layer of fat, both of which help protect them from the cold.

Continue Reading

What is the function of a Petri dish?

To study bacteria, scientist begin by taking a swab or sample of the bacteria in question. For example, if a scientist was studying salmonella bacteria, he may drag a cotton swab along some spoiled food. The swab is then wiped on the food source in the petri dish and sealed. Depending on the bacteria in question, the petri dish may be incubated in a heated box to accelerate the growth of the bacterial culture. After a few hours, days or weeks, the scientist will open the petri dish and examine the bacteria growing inside.\nScientists may view the bacteria in a petri dish microscopically, or th..

Continue Reading

How do you determine how many days it is until Christmas?

An example is the 17th of November. There are 30 days in the month of November. With the date being the 17th, there are 12 full days left in the month. Since the holiday falls on the 25th of December, one should add 12 plus 24 days to reach the 25th day of December. There are multiple options online offering Christmas countdowns.

Continue Reading
Showing 8011 to 8020 of 10000 (1000 Pages)