heart

What is pulmonary artery

Only artery that carries deoxygenated blood

Right p.a - carries deoxygenated blood to right lung

Left p.a - carries deoxygenated blood to left lung

What is carotid arteries

2 main blood vessels that carry oxygenated blood to face neck and brain

Aorta

Carries oxygenated blood around body

Semi lunar valves and what are the 2 types

Seperate arteries

Prevents backflow to ventricles

Pulmonary valve (right)

• Separates pulmonary artery and right ventricle

Aortic valve (Left)

• Separates aorta from left ventricle

What is tendinous chords

Makes sure valve dont turn inside out by ventricle contraction

What is bicuspid valves and how many flaps does it have

Left atrioventricular valve (oxygenated)

• Only has 2 flaps

• Seperate chambers (atrium + ventricles)

• Prevent blood flowing back into atria during ventricular contraction

Septum

Thick wall of tissue that divides the right and left sides of the heart

(Atrial septum == seperate the atria)

(Ventricular septum = separates ventricles)

What are the 2 types of vena cavas and roles

Superior vena cava

• carries deoxygentaed blood from upper part of body to heart

Inferior vena cava

• carries deoxygenated blood from lower parts of body

Pulmonary veins

LEFT P.V = Carry oxygenated blood from the lungs on left side

RIGHT P.V = carry o.b from lungs on right side

Tricuspid valves and how many flaps does it have

3 cuspid valves

RIGHT ATRIOVENTRICULAR VALVE

Seperates right atria to right ventricle

What does d.b enter through

Deoxygenated blood enters through the vena cavas

What happens when d.b enters the right atria

Right atrium fills (atria walls = thin) - pressure - opens up tricuspid valves

D.blood fills ventricle and once atrium ventricle is filled = atrium contracts = forces blood into ventricle

Ventricle contracts = tricuspid valves shut

Ventricle fully contracts - through semi lunar valves - through pulmonary artery to lungs

What is the path oxygenated blood takes

Enters left atrium from pulmonary vein

Pressure increases - bicuspid valve open between left atrium + left ventricle - fills with. Blood

Atrium full + ventricle full = atrium contracts - 0.blood in ventricle

Left ventricle contracts - through semi lunar valves - out aorta + around body - as ventricle contracts the bicuspid valves close

Why are muscular walls thicker on left than the right

Lungs are smaller than rest of the body

Right side pumps relatively short distance

Only overcomes resistance of pulmonary circulation

The left side produces more force to overcome resistance of aorta and arterial systems of whole body and move blood under pressure consistently

Why do most people have small gaps in heart

Septum isn’t fully developed after birth

(Blood is oxygenated in placenta not unusual so blood can mix freely)

Days after birth the gap closes to ensure blood is separating kept

Any gap after first few weeks = hole in heart

Most people have small gaps but not harmful until it gets bigger

What is heart listened to by

Stethoscope