Pericardium is a membrane that surrounds the heart and the roots of the blood vessels. It is composed of two layers: the serous layer and the fibrous layer.
The Pericardium keeps the heart in place and in proper working order. Any disorders that occurs in the pericardium will also affect how the heart works.
Inflammation of the pericardium may be a result of infection, heart attack, heart surgery, and other medical side effects.
tricuspid valve is located between the right atrium and ventricle
The relative time of divergence from a common ancestor can be estimated by comparing the nucleotide/protein sequence.
<h3>What is sequence homo-logy?</h3>
In molecular biology, sequence homo-logy means the degree of similarity between sequences due to a common ancestor.
A sequence is a given fragment of a single DNA strand where nucleotides are arranged in a specific linear order.
Divergence or separation between lineages is directly proportional to the level of sequence homo-logy.
In conclusion, the relative time of divergence from a common ancestor can be estimated by comparing the nucleotide/protein sequence.
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SUBSTANCE: Material composed of only one kind of matter throughout (same atoms or same molecules) ELEMENT: A substance that cannot be decomposed (broken down) into simpler substances by ordinary chemical means. Examples: gold, iron, carbon, hydrogen, oxygen, nitrogen.
