Question

C. Define these terms.
1. Cardiac cycle
3. Antigen
5. Double circulation
2. Heartbeat
4. Antibody
6. Hypertension​

Answer 1

Answer:

1. The cardiac cycle is defined as a sequence of alternating contraction and relaxation of the atria and ventricles in order to pump blood throughout the body. ... In other words, when the atria are in diastole, the ventricles are in systole and vice versa.
2. one complete pulsation of the heart. 2 : the vital center or driving impulse. 3 : a brief space of time : flash —used chiefly in the phrase in a heartbeat.
3. An antigen is any substance that causes your immune system to produce antibodies against it. ... An antigen may be a substance from the environment, such as chemicals, bacteria, viruses, or pollen.
4. Antibody: An immunoglobulin, a specialized immune protein, produced because of the introduction of an antigen into the body, and which possesses the remarkable ability to combine with the very antigen that triggered its production. ... Some antibodies are autoantibodies and home in against our own tissues.
5. a circulatory system in which the blood makes two distinct circuits — compare pulmonary circulation, systemic circulation.
6. High blood pressure (hypertension)A condition in which the force of the blood against the artery walls is too high.

Usually hypertension is defined as blood pressure above 140/90, and is considered severe if the pressure is above 180/120.

Answer 2

Answer:

Cardiac cycle:cardiac cycle is the performance of the human heart from the ending of the heartbeat to the beginning of the next.

Antigen:An Antigen is any substance that causes your immune system to produce antibodies against it.

Double circulation:The human circulatory system is a double circulatory system.

Heartbeat:when the heart is busy with pumping blood, the different chambers of the heartbeat open and close, or contract and relax. Each time the chambers contract and relax the thumping sounds is produced. This is known as heartbeat.

Antibody:An antibody is a protein produced by the body immune systemin response to the disease carrying microbe entering our body.

Hypertension:hypertension is a high blood pressure