Biology, asked by krishanukarmakar8, 5 months ago

Define:
1. Immunity
2. Pulse
3. Systole
4. Diastole
5. Heartbeat

Answers

Answered by kumarshlok784
1

Answer:

Diastole and systole are two phases of the cardiac cycle. They occur as the heart beats, pumping blood through a system of blood vessels that carry blood to every part of the body. Systole occurs when the heart contracts to pump blood out, and diastole occurs when the heart relaxes after contraction

the state of being immune from or insusceptible to a particular disease or the like. the condition that permits either natural or acquired resistance to disease. the ability of a cell to react immunologically in the presence of an antigen.

Heart rate, also known as pulse, is the number of times a person's heart beats per minute. Normal heart rate varies from person to person, but a normal range for adults is 60 to 100 beats per minute.

Answered by MonikaJagat
2

Explanation:

1.In biology, immunity is the capability of multicellular organisms to resist harmful microorganisms. Immunity involves both specific and nonspecific components. The nonspecific components act as barriers or eliminators of a wide range of pathogens irrespective of their antigenic make-up.

2.Pulse, rhythmic dilation of an artery generated by the opening and closing of the aortic valve in the heart. A pulse can be felt by applying firm fingertip pressure to the skin at sites where the arteries travel near the skin's surface; it is more evident when surrounding muscles are relaxed.

3.The systole is the part of the cardiac cycle during which some chambers of the heart muscle contract after refilling with blood. Systole is the portion of the cardiac cycle in which the heart muscle contracts, forcing the blood into the main blood vessels.

4.Diastole is the part of the cardiac cycle during which the heart refills with blood after the emptying done during systole (contraction). Ventricular diastole is the period during which the two ventricles are relaxing from the contortions/wringing of contraction, then dilating and filling; atrial diastole is the period during which the two atria likewise are relaxing under suction, dilating, and filling.

5.A heartbeat is a two-part pumping action that takes about a second. As blood collects in the upper chambers (the right and left atria), the heart’s natural pacemaker (the SA node) sends out an electrical signal that causes the atria to contract. This contraction pushes blood through the tricuspid and mitral valves into the resting lower chambers (the right and left ventricles).

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