Nematodes have a pseudocoelom and are the simplest animals that have a complete digestive tract.
Nematodes also known as roundworms are animals well adapted to variety of environments, meaning that are ubiquitous. Nematodes are small, bilaterally symmetric with ornamented ring body structures. Their body is covered with cuticle that works with the muscles beneath it to create a hydroskeleton. There are free-living species and parasitic species of Nematoda.
Science is valued by society because the application of scientific knowledge helps to satisfy many basic human needs and improve living standards. Finding a cure for cancer and a clean form of energy are just two topical examples.
Trenches are formed by subduction, a geophysical process in which two or more of Earth's tectonic plates converge and the older, denser plate is pulled beneath the lighter plate and deep into the mantle, causing the seafloor and outermost crust ( the lithosphere) the bend and form a steep, V- shaped depression.
The impact in this case is the ventricles will beat more slowly.
Sinoatrial node acts as a pace maker for the heart skipping the plateau phase and the electric impulses are created here. This node lets the blood into ventricles.
Atrioventricular node acts as controller of heart rate and serves as an electrical relay station. This node connects the right atrium and right ventricle.
