All veins are important because they carry blood throughout the body and all veins have a specific purpose/job to do to help the body function. Many veins take the deoxygenated blood...blood that doesn't have oxygen in them any more because it was used up...and transport it back to the heart where the heart pumps the deoxygenated blood to the lungs to become oxygenated...oxygen is put back into the blood.
here are two of the many veins in the body:
- pulmonary veins and other veins involved with the heart system/the functioning of the heart
-systemic veins: I believe this also deals with the heart but it can also deal with veins in the upper part of our body (includes: head, neck/throat area and chest area I believe). We also have veins in the lower part of the body (abdomen (area that contains organs/stomach area), legs, and whatever else falls under the lower part of the body.
I tried to keep this in simple terms from what I learned in biology. For example, within the veins in the abdomen there are more specific names to the veins and their function.
Upwelling is important to mix the nutrients that are present deep inside the water.Updewelling is a phenomenon in which the deeper water rises and gets mixed to the surface water to promote the growth of phytoplanktons and seaweeds as the water that is present deep inside is rich in nutrients.These phytoplanktons serve as as source of energy for large fishes and other aquatic animals. As these large animals are higher in population and are an important part of food chain and they also provide food to different marine mammals ,sea birds.The deep water infuses with costal water so to serve as a fuel for high productivity of marine ecosystem.
Answer:
An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in.
Explanation:
Contact forces only work by pushing.
Contact forces only work by pulling.
Contact forces require the physical contact between objects.
Contact forces work between two objects that do not touch.
In physics, a contact force is a force that acts at the point of contact between two objects, in contrast to body forces. Contact forces are described by Newton's laws of motion, as with all other forces in dynamics. Contact force is the force in which an object comes in contact with another object.
Hope this helps!