Amass composed of fibrin and platelets that collect on valve leaflets or their cords is called a(n)

VEGETATION

Explanation:

It is referred to as an infected mass due to the production of bacteria in one heart valves. This infected mass can be due to bacteria in the bloodstream during any dental work, or any similar process related to bloodstream. This infected mass is called VEGETATION and related to endocarditis which is composed of fibrin and platelets.

Vegetation.

Explanation:

The platelets are the thread like structures that plays an important role in the immune system of the body. Platelets helps in the blood clotting during the injury.

Vegetation may be defined as the the abnormal growth of the particular cells. This vegetation is often associated with the endocarditis. They mainly composed of the mass of the platelets and fibrin. This might affects the heart of the individual.

Thus, the answer is vegetation.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above