Question

define the following number 1 cardiac cycle number 2 heartbeat number 3 antigen number 4 antibody​

Answer 1

1.cardiac cycle= cardiac cycle is the sequence of events that occurs when the heart beats. As the heart beats, it circulates blood through pulmonary and systemic circuits of the body. There are two phases of the cardiac cycle. In the diastole phase, the heart ventricles are relaxed and the heart fills with blood

2. Heartbeat=

the regular movement or sound of the heart as it sends blood round the body

3.Antigens=a substance that enters the body and starts a process that can cause disease. The body then usually produces substances (antibodies) to fight the antigens

4.Antibody=a substance that the body produces in the blood to fight disease