Heart anatomy

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• 6 pages• Chapter 12: Heart and Chapter 13: Blood Vessels• Name, period, seat #• Color picture

Heart Anatomy, Part 1 (pg 2)

Heart Anatomy (pg 2)

• Heart: muscular pump that provides the force necessary to circulate blood to all tissues in the body

Heart Anatomy (pg 2)

• Heart: muscular pump that provides the force necessary to circulate blood to all tissues in the body

• Pumps about 5 liters of blood per minute

Location

• Between the lungs. Rests on the diaphragm. Most superior portion is at the level of the second rib

Location

• Between the lungs. Rests on the diaphragm. Most superior portion is at the level of the second rib

• 2/3 of the heart is to the left of the body midline

Location

• Between the lungs. Rests on the diaphragm. Most superior portion is at the level of the second rib

• 2/3 of the heart is to the left of the body midline

• Heart is about the size of a closed fist

Coverings

• Heart is covered by a loose two-layered sac called the pericardium

Coverings

• Heart is covered by a loose two-layered sac called the pericardium

• Fibrous pericardium: tough, protective outer layer.

Coverings

• Heart is covered by a loose two-layered sac called the pericardium

• Fibrous pericardium: tough, protective outer layer.

• Parietal pericardium: Thin inner layer. Produces pericardial fluid for lubrication

Heart Wall

• Called the myocardium and made of cardiac muscle

Heart Wall

• Called the myocardium and made of cardiac muscle

• Cells are connected by intercalated disks

Heart Wall

• Called the myocardium and made of cardiac muscle

• Cells are connected by intercalated disks• Myocardium is supplied with oxygenated

blood by the coronary arteries, which branch off the aorta

Heart Wall

• Called the myocardium and made of cardiac muscle

• Cells are connected by intercalated disks• Myocardium is supplied with oxygenated

blood by the coronary arteries, which branch off the aorta

• Blockage of coronary artery = heart attack

Chambers of the Heart

Atria: thin-walled chambers that receive blood from veins.

Chambers of the Heart

Atria: thin-walled chambers that receive blood from veins.

Ventricles: thick-walled chambers that forcefully pump blood

1. Right Atrium: receives deoxygenated blood from the superior and inferior vena cava

1. Right Atrium: receives deoxygenated blood from the superior and inferior vena cava

2. Right Ventricle: pumps blood through the pulmonary arteries to the lungs, where it becomes oxygenated

1. Right Atrium: receives deoxygenated blood from the superior and inferior vena cava

2. Right Ventricle: pumps blood through the pulmonary arteries to the lungs, where it becomes oxygenated

3. Left Atrium: receives oxygenated blood from the lungs via the pulmonary veins

1. Right Atrium: receives deoxygenated blood from the superior and inferior vena cava

2. Right Ventricle: pumps blood through the pulmonary arteries to the lungs, where it becomes oxygenated

3. Left Atrium: receives oxygenated blood from the lungs via the pulmonary veins

4. Left Ventricle: Pumps oxygenated blood to the body via the aorta. Thickest, strongest chamber

Heart Dance

Heart Dance

• RIGHT Atrium, Ventricle LUNGS!

Heart Dance

• RIGHT Atrium, Ventricle LUNGS!• LEFT Atrium, Ventricle BODY!

Heart Anatomy, Part 2 (pg 4)

Valves of the Heart

Valves prevent blood from flowing backward

Valves of the Heart

Valves prevent blood from flowing backward1. Atrioventricular (AV) valves: Between atria

and ventricles

Valves of the Heart

Valves prevent blood from flowing backward1. Atrioventricular (AV) valves: Between atria

and ventricles• Anchored by strings called the chordae

tendineae, which prevents the valve from letting blood back into the atria

Valves of the Heart

Valves prevent blood from flowing backward1. Atrioventricular (AV) valves: Between atria

and ventricles• Anchored by strings called the chordae

tendineae, which prevents the valve from letting blood back into the atria

• Right = tricuspid valve

Valves of the Heart

Valves prevent blood from flowing backward1. Atrioventricular (AV) valves: Between atria

and ventricles• Anchored by strings called the chordae

tendineae, which prevents the valve from letting blood back into the atria

• Right = tricuspid valve• Left = bicuspid (mitral) valve

2. Semilunar Valves: located at the bases of blood vessels that carry blood from the ventricles

2. Semilunar Valves: located at the bases of blood vessels that carry blood from the ventricles

• Each valve has 3 cup-like cusps. When blood flows back toward the ventricles, the cups fill with blood, causing the valve to close

2. Semilunar Valves: located at the bases of blood vessels that carry blood from the ventricles

• Each valve has 3 cup-like cusps. When blood flows back toward the ventricles, the cups fill with blood, causing the valve to close

• Pulmonary SL valve: at exit of right ventricle

2. Semilunar Valves: located at the bases of blood vessels that carry blood from the ventricles

• Each valve has 3 cup-like cusps. When blood flows back toward the ventricles, the cups fill with blood, causing the valve to close

• Pulmonary SL valve: at exit of right ventricle• Aortic SL valve: at exit of left ventricle

Pathway of Blood

• Hand-written notes