Cardiovascular System Biology Diagrams The human cardiac cycle consists of four main phases. These are-Atrial Systole; Ventricular Systole; Atrial Diastole, and; Ventricular Diastole; In addition to these four main phases, there is an intermediate phase known as protodiastole that marks the end of systole and the beginning of diastole. Figure: Different phases of cardiac cycle 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. It starts at the beginning of one heartbeat and ends at the beginning of another. The process begins as early as the 4th gestational week when the heart first begins contracting.. Each cardiac cycle has a diastolic phase (also called
The human heart is a muscular organ that is about the size of a fist. It pumps blood through a set of connections between arteries and veins, known as the cardiovascular system. It involves systemic and pulmonary circulation. Learn more in detail about Cardiac Cycle, Its anatomy,
Definition, Phases and Quiz Biology Diagrams
The Cardiac Cycle Video. The entire cardiac cycle can be seen in the following animation, which tracts the cardiac cycle along with the pressure and volume of different chambers. Cardiac Cycle Animated. An import tool to measure the cardiac cycle is the electrocardiogram, which can be seen as the green line on the above graph.
In measuring the output of the heart, there are two relevant parameters: heart rate and stroke volume. Heart rate is how many cardiac cycles there are per minute. We usually measure this as a pulse. A normal pulse is considered to be 72 beats per minute (bpm). Stroke volume is how much blood is ejected from the heart with each cardiac cycle.
Cardiac Cycle and its Phases Biology Diagrams
The Phases of the Cardiac Cycle. The cardiac cycle consists of several phases, which can be primarily broken down into two main sections: diastole and systole. Let's explore these components in a friendly, approachable way. 1. Atrial Systole. Picture this: you're at a concert, and the band just finished playing an encore. The Cardiac Cycle: An Overview. Before we dive into the phases, let's take a moment to understand what the cardiac cycle actually is. Simply put, the cardiac cycle is the sequence of events that happen during one heartbeat. It involves both the contraction (systole) and relaxation (diastole) phases of the heart's chambers.
