Heart characteristics

-Size; Fist and less than 1 pound

Where is the heart located?

• - center

• - Between lungs and thoracic cavity

Orientation of heart;

Heart coverings

; double layered sac that anchors and protects the heart

Heart coverings

• ; membrane around heart cavity

; surface of the heart

Heart coverings

; space around the heart inbetween of parietal and visceral pericardium

Heart layers

• surface of the heart

Heart layers

• - 2nd layer

• - thickest, middle layer

Heart layers

• -pinakaloob

• - smooth inner surface

• - 1 centrally located nucleus

  • - BRANCHING CELLS

  • - rich in mitochondria

  • - striated ( actin and myosin )

  • - Calcium and ATP

  • - Intercalated discs connect cells

Chambers of the heart

• separates atria from ventricles

• - a thin wall of tissue that separates the two upper chambers of the heart, called the right and left atria.

• - upper portion

• holding chambers

• small, thin wall

• contracts to push blood into the ventricles

  • Right atrium

  • Left atrium

• lower portion

• “pumping” chambers

• thick, strong wall

• contract “forcefully” to propel blood into the different parts of the body

  • Right ventricle

  • Left ventricle

Parts of the heart

• - structures that ensure one way blood flow

• - located between atria and ventricles

• 3 cusps/leaflets

• AV valve between right atrium and right ventricle

• - 2 cusps/leaflets

• Av valve between left atrium and left ventricle

• attached to AV valve flap

• it supports valves

• - STRING LIKE

SEMILUNAR VALVES

• - located on the base of the pulmonary trunk

• SEMILUNAR VALVES

• - located on the base of aorta

• - drains blood: upper

  • head, neck, thorax, upper limbs

  • higher than diaphragm 

• - drains blood: lower

  • below diaphragm

    • abdominopelvic cavity

    • lower limbs

• - amount of blood returning to the heart

• blue

• oxygen deficient

• - amount of blood going out of the heart

• red 

• oxygenated

contraction of atria & ventricles by cardiac muscle cells
- same as electrical system

• - located in the right atrium

• where action potential originates

• “pacemaker”

• more/large calcium channels

• - supply blood to heart wall

• originates from base of aorta (aortic valve)

• - has two parts

• - Left coronary artery

• -Right coronary artery

• - 3 branches

• supplies blood to anterior heart wall & left ventricle

• - located in right side of aorta

• supplies blood to right ventricle

what chamber of the heart firstly gathers deoxygenated blood

• - Superior vena cava = upper body

• - inferior vena cava = lowerbody

• - FIRST STEP

next step, the deoxygenated blood goes thru the what?

next, where does the dexoygenated blood go?

• 3rd step

after going thru the RV, where would be the deoxygenated blood go?

• 4th step

next, where does the deoxygenated blood go after entering the pulmonary valve?

• - step 5

Next, the only BLUE ARTERY in the heart

• - typically arteries are RED

• - step 6

where oxygenation occurs

• - step 7

after oxygenation, where does the oxygen rich blood enter the heart?

• - beside the left atrium

• - step 8

next, what chamber does and collects the blood from the pulmonary vein

• - step 9

next, where does the blood go thru in order to go to the left ventricle

• - step 10

• - where does the blood go after passing the bicuspid valve/mitral valve

step 11

next, where is the blood going thru after the left ventricle?

After the aortic valve, where does the oxygenated blood go before being pumped into the body?

-step 13

where does the oxygenated blood go after everything?

• step 14

Conduction system of heart

• - what are the parts of the left coronary artery?

What are the parts of the Right coronary arteries?

What does the left coronary artery provide blood to?

What does the right coronary artery provide blood to?

Pathway of action potential thru the heart

• - answers from left to right