The Cardiovascular System Human Heart

Image - http://www.thewellingtoncardiacservices.com/the-heart-cardiovascular-system.asp

Cardiovascular System

• Cardio = pertaining to the heart

• Vascular = pertaining to a transport system– Blood vessels

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Cardiovascular System Functions

Transportation

Homeostasis

Circulatory Pathways

• Pulmonary Circulation• Systemic Circulation

• Examples:

– Renal Circulation– Hepatic Portal System– Coronary Circulation

Functions of the Heart

• Center of the cardiovascular system, the heart = pump

• Connects to blood vessels that transport blood between the heart and other body tissues.

• Arteries and veins entering and leaving the heart are called the great vessels.

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Functions of the Heart

• Ensures the unidirectional flow of blood through both the heart and the blood vessels.

• Acts like two independent, side-by-side pumps that work independently but at the same rate.

• Develops blood pressure through alternate cycles of heart wall contraction and relaxation.

Yale University - School of medicine

Location of the Heart

• Major body cavities

• Thoracic cavity

http://wellnessadvocate.com/?dgl=10463

http://apbrwww5.apsu.edu/thompsonj/Anatomy%20&%20Physiology/2010/2010%20Exam%20Reviews/Exam%201%20Review/Fig%201.9%20%20The%20Body%20Cavities.htm

Figure 12.2a

Pericardium

• Pericardium – aka. Pericardial sac– Fluid filled sac that

surrounds the heart and proximal ends of the great vessels

http://www.cardiac-risk-assessment.com/heart-information/your-pericardium

http://academic.amc.edu/martino/grossanatomy/site/NURSES/TUTORIALS/Heart/Pericardium.htm