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Cardiovascular System

Disorders of The Blood – RBC, WBC And Hemostasis

Blood disorders may be grouped as red blood cell disorders, white blood cell disorders, and disorders of hemostasis. Normal values for common blood tests are located on the inside back cover. Blood tests are valuable in diagnosing a variety of disorders. Note that many of the disorders

Skeleton of the Heart – Function and Importance

The Skeleton of the Heart consists of fibrous tissue and creates the central support of the heart. It is composed of fibrous rings that surround the atrioventricular, pulmonary, and aortic orifices. These rings provide circular form and rigidity to the atrioventricular orifices and roots of the aorta

Cardiac Cycle – Events and Sound of Heartbeat

The cardiac cycle refers to the sequence of events that occur during one heartbeat. The contraction phase of a cardiac cycle is known as systole (sis ‘-to-le); the relaxation phase is called diastole (di ‘-as-to-le). During diastole the muscles of the heart relaxes and refills the blood

Variations in the Coronary Arteries/ Coronary Dominance

The origin, course, and distribution of the posterior interventricular artery are variable. In right coronary dominance, the posterior interventricular artery is a branch of the right coronary artery. It’s seen in 90% of the individuals. In left coronary dominance, the posterior interventricular artery originates from circumflex branch

Autonomic Regulation- Neural And Hormonal Regulation of The Heart

Heart rate regulation is primarily under the control of the cardiac control center located within the medulla oblongata of the brain. It receives sensory information about the level of blood pressure from baroreceptors located in the aortic arch and the carotid sinuses of the internal carotid arteries.

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