Functions of the Heart

Functions of the Heart

HideShow resource information
Preview of Functions of the Heart

First 130 words of the document:

The Heart: Structure and Function
1. Atrial Systole: The Atria begins to fill with blood, when the pressure in the
atria is higher then the pressure in the ventricles the Atrioventricular (AV)
valves open.
Blood is forced into the Ventricles. The AV valves close to prevent
backflow.
1. Ventricular Systole: When the pressure in the ventricles exceeds that of
the Aorta the semi lunar valves open, and blood flows into the arteries.
2. Diastole: All chambers relax the pressure of blood causes the semi
lunar valves to close preventing backflow into ventricles.
Exam Question:
The blood pressure in the aorta is higher than in the pulmonary artery.
Explain what causes the blood pressure in the aorta to be higher. (1)

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all resources »