Heart Guided Notes

Location

Within the ______Pointed ______extends to the left. It rests on the ______at the 5th intercostal space. It has a ______, lies under the 2nd rib.

Pericardium

A ______encloses the heart. Thin ______pericardium= ______- hugs the surface of the heart. Loose outer layer= ______.

Pericardial Fluid

Slippery ______produced by the membrane between the ______layers. It allows the heart to ______in a ______.

Myocardium

Heart walls are made of ______.

Chambers

______hollow chambers that are lined with a ______lining called the ______.

Atria

______superior ______chambers that are ______walled. Blood flows into and fills the ______under ______.

Ventricles

______inferior ______(pumping) chambers that are ______walled. It forces blood ______of the ______and into large ______. A ______divides the heart longitudinally. Includes the ______septum and the ______septum.

Double Pump

______circulation to ______and back. ______circulationto ______and back.

Pulmonary Circulation: Right side of the ______ ______ ______side of the heart.

Systemic Circulation: ______side of the heart  ______ ______side of the heart.

Valves

______valves allow blood to flow ______. It prevents ______. ______AV valves=______. 2 semilunar valves.

AV valves are located between atria and ______. It prevents backwash into ______. ______AV= ______or mitral (2 flaps). ______AV= ______(3 flaps). The AV valves are ______to the wall of the ventricles by the ______. The valves are ______when the ventricle is ______; ______when the ventricle is ______.

Semilunar valves

______the base of the large arteries ______the ventricles. Each valve has ______(flaps). When ventricles ______, they ______; when ______, they ______to prevent ______. Pulmonary ______-from the ______ventricle to the ______trunk (artery).Aortic ______-from the ______ventricle to the ______artery. Each set of valves open at different times:

-______opens when ______relaxes

-______opens when ventricles ______.

Oxygen Poor Blood-pathway through body

From the ______of the body tissue  ______and ______vena cava  right ______ ______valve  right ______ ______semilunar valve  Pulmonary ______pulmonary______ branch ______and ______ ______ picks up ______and dumps off ______.

Oxygen Rich Blood-pathway through body

Drained from the lungs  ______pulmonary veins  left ______ ______valve  left ______ ______semilunar valve  ______ body tissues  dumps off ______and picks up carbon dioxide.

Cardiac Circulation

Although the heart ______are filled with blood almost continuously, that blood does ______nourish the ______. The ______and ______coronary arteries branch from the ______of the ______and encircle the heart in a ______at the junction of the atria and ______. Those arteries are ______when the ventricles ______and are only able to supply ______to heart muscle between ______. Rapid heart rate may cause ______blood supply. The ______your resting heart rate is, the better ______your heart muscle is. The ______is drained by the coronary ______coronary ______ the right ______.

Cardiac Cycle

The ______and ______occurring from one ______to the next.

-Systole= ______

-Diastole= ______

Lub-Dup-Pause

“Lub”- ______of the ______valves-longer and ______-ventricles ______

“Dup”- ______of ______valves-shorter and ______-ventricles ______.

“Pause” is the heart in complete ______

______are usually problems with the valves ______.

Atria contract ______. As they begin to ______ ventricles ______(ventricular systole)  ventricles ______(ventricular diastole).

Conduction System

______muscle cells can ______spontaneously and ______. Two types of control systems:

-______

-______

Intrinsic

______or Nodal system. A cross between ______and ______tissue. It has ______cells and can initiate ______or trigger ______.

SA Node

-SA= ______. Located on the ______atrial wall. ______-starts each beat

AV Node

______. It’s located on ______septum. Bundle of ______ bundle branches  ______fibers  ventricles ______.

Extrinsic System

Heart contractions cam be changed by ______nerves, ______, hormones, and ions (______). ______(sympathetic influence) affects ______node which ______heart rate.