In which male reproductive structure is fructose-rich fluid produced?

Systole occurs between s1 and s2 and after active filling fill 100% of the ventricles (caused by the sequential contraction created from the SA node). The increased pressure in the ventricles will cause the now lower pressured atrium valves to shut causing s1. Then with all valves closed this creates what is called an Isovolumetric contraction. This occurs when the SA node contraction will travel down the AV node which travels down the septum and eventually reaches the purkinje fibers and causes a simultaneous contraction and open the semilunar valves. This entire process occurs during the systolic phase.

An easy mnemonic to remember is diastolic which is the opposite of systolic sounds like it has the word "die" in it. Dying is when we usually relax and Diastole is the relaxation phase of the cardiac cycle. Systole would therefore be the contraction phase.

Cells need energy to do basic functions which are necessary for living. Cells need energy to move, synthesize proteins, divide, transport the materials, and to do the work.

How do cells get energy?

Cells require energy which they get from the food they eat. The food is utilized in the production of energy in the form of ATP. This ATP is produced by the process of cellular respiration in the mitochondria of cell.

Cells require energy to do the basic functions which are important to sustain life. These include the following functions:

1. Basal Metabolism: Basal metabolism is the minimal amount of energy which is needed to keep the body functioning and alive while the body is at rest.

2. Body Composition: Body composition is one determinant of energy requirements. It is the energy requirement for the formation of new cells i.e., cell division which maintains the cell number constant in body.

3. Digestion and Absorption: Digestion and absorption are the basic processes which are used to produce energy in the form of ATP through cellular respiration in the mitochondria of cell.

4. Physical Energy: For the production of physical energy which is required for causing movement, energy is required.

5. Mental Energy: To do mental work such as learning, thinking, etc. Energy is needed by the cells.

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