Anatomy of the Heart

Structure

• The heart is a muscular organ that pumps blood throughout the body.
• It is a hollow, cone-shaped organ located in the thoracic cavity, between the lungs.
• The heart is divided into four chambers:
  • Right atrium (upper right chamber)
  • Right ventricle (lower right chamber)
  • Left atrium (upper left chamber)
  • Left ventricle (lower left chamber)

Function

• The heart pumps blood throughout the body, supplying oxygen and nutrients to tissues and organs.
• It receives deoxygenated blood from the body and pumps oxygenated blood from the lungs to the body.
• The heart beats approximately 100,000 times per day, pumping around 2,000 gallons of blood.

Blood Flow

• Deoxygenated blood from the body enters the right atrium through the superior and inferior vena cavae.
• Blood flows from the right atrium to the right ventricle, then to the lungs to pick up oxygen.
• Oxygenated blood from the lungs enters the left atrium, then flows to the left ventricle, and finally to the rest of the body through the aorta.

Heartbeat Regulation

• The heartbeat is regulated by the sinoatrial (SA) node, located in the right atrium.
• The SA node generates electrical impulses that stimulate the heart to contract.
• The heartbeat can be influenced by the autonomic nervous system, which can increase or decrease heart rate in response to physical activity, emotions, and other factors.

Heart Health

• A healthy heart is essential for overall health and well-being.
• Risk factors for heart disease include high blood pressure, high cholesterol, smoking, obesity, and lack of physical activity.
• Regular exercise, a balanced diet, and stress management can help maintain a healthy heart.

Structure

• Heart is a muscular, hollow, cone-shaped organ located in the thoracic cavity between the lungs
• Divided into four chambers: right atrium, right ventricle, left atrium, and left ventricle

Function

• Pumps blood throughout the body, supplying oxygen and nutrients to tissues and organs
• Receives deoxygenated blood from the body and pumps oxygenated blood from the lungs to the body
• Beats approximately 100,000 times per day, pumping around 2,000 gallons of blood

Blood Flow

• Deoxygenated blood from the body enters the right atrium through the superior and inferior vena cavae
• Blood flows from the right atrium to the right ventricle, then to the lungs to pick up oxygen
• Oxygenated blood from the lungs enters the left atrium, then flows to the left ventricle, and finally to the rest of the body through the aorta

Heartbeat Regulation

• Heartbeat is regulated by the sinoatrial (SA) node, located in the right atrium
• SA node generates electrical impulses that stimulate the heart to contract
• Heartbeat can be influenced by the autonomic nervous system, which can increase or decrease heart rate in response to physical activity, emotions, and other factors

Heart Health

• A healthy heart is essential for overall health and well-being
• Risk factors for heart disease include high blood pressure, high cholesterol, smoking, obesity, and lack of physical activity
• Regular exercise, a balanced diet, and stress management can help maintain a healthy heart

Structure and Location

• Heart is a muscular, hollow, cone-shaped organ in the thoracic cavity, between the lungs
• Divided into four chambers: right atrium, right ventricle, left atrium, and left ventricle

Blood Flow and Circulation

• Deoxygenated blood enters the right atrium from the body
• Blood flows from right atrium to right ventricle, then to lungs to pick up oxygen
• Oxygenated blood from lungs enters the left atrium
• Blood flows from left atrium to left ventricle, then to the rest of the body

Heartbeat Regulation

• Heartbeat regulated by the sinus node, a group of cells in the right atrium
• Sinus node sends electrical signals to the atrioventricular (AV) node
• AV node relays signals to the ventricles, causing them to contract and pump blood out of the heart
• Autonomic nervous system controls heartbeat, increasing or decreasing heart rate as needed

Blood Vessels and Network

• Heart connected to the body by a network of blood vessels: arteries, veins, and capillaries
• Arteries carry oxygenated blood away from the heart
• Veins carry deoxygenated blood back to the heart
• Capillaries allow for exchange of oxygen and nutrients with the body's tissues

Functions and Capabilities

• Heart pumps approximately 2,000 gallons of blood per day
• Heart beats around 100,000 times per day
• Supplies oxygen and nutrients to the body's tissues
• Removes waste products from the body's tissues