Explanation:
The direction of waves of contraction in the heart are very important because they represent the cardiac contraction pathway. It begins from sinoatrial node due to spontaneous depolarization (nodal cells) and triggering of action potentials and transmission of the same to the cardiac cells taking part in the conduction pathway in the cardiac muscle fibers.
The blood flows from the right atrium to the right ventricle via the tricuspid valves when the atrium contracts and ventricles expand. Once the ventricles receive its full amount of blood the tricuspid valves shuts to prevent any backflow of blood into the atrium. When the ventricles contract, blood enter the aorta through the aortic valve.
Iron is an important mineral required by the body to produce the ‘heme’ part of the protein hemoglobin present in the red blood cells of the blood. Oxygen binds with hemoglobin and is carried via blood to various parts of the body. Hence intake of recommended dietary allowance of iron is very important since deficiency can lead to various conditions like anemia.
Polycythemia vera is a condition which leads to increased production of red blood cells. this increases the blood volume and thickens the blood and slows down the blood flow and causes blood clots. The slowness of blood flow and formation of blood clots can lead to heart failure and heart attacks respectively.
it would increase blood pressure because it working harder to get the blood through them.
Answer:
Eating contaminated food
Explanation:
Well sneezing into the sleeve of your shirt does help decrease spread of a disease and is reccomended as we are in a pandemic at the moment. washing your hands before eating is getting rid of germs but that doesn't mean that there arent other people that are sick but doesnt not help spread a disease. Staying at home when you're sick is quarantining and that helps you recover and does not spread the disease as easily. So you are left with the answer of eating contaminated food.
Answer:
Sanath Jayasuriya.
Explanation:
He's the greatest Sri Lankan Cricketer ever born.Sanath Jayasuriya has been at the vanguard of Sri Lanka's ascent as a cricketing power, and his rise as a feared international batsman has coincided with Sri Lanka's rise as a force to be reckoned with in international cricket.
Jayasuriya started his career as a fairly non-descript utility player who had an ability to smack the ball hard. His performances stayed ordinary for much of his early career. In fact, from his debut in 1989 till 1995, Jayasuriya had never ended a year with an average above 30 in ODIs and had played only a handful of Tests.
Answer:
B. the conventional standards of grammar, usage, and mechanics
Explanation:
