Heart Anatomy

By: Heidi Hisrich

Orientation

Which side is left? Which side is left?

External Anatomy—panel 1

Apex (from Latin, “point/tip,” points toward left)

Coronary Artery—”feeds” the heart itself (can only see from anterior/front view), coronary means “crown/wreath” and surrounds heart like a crown

Left atrium

Right atrium

Right ventricleLeft ventricle

Superior Vena Cava

Inferior Vena Cava

AortaPulmonary arteries

Pulmonary veins

Prep for HW and then add flow as Mrs. H goes through it in class

Heart Flow—panels 2-3

Video showing blood flow3D animationReally corny video quiz—test yourself

Left side: Systemic

Pump

Right side: Pulmonary

Pump

Heart Structures—panels 4-5To make the booklets, use 4 half-sheets of paper, cut hamburger style

Booklet insides

Left side style Right side style

To make the shutters, use 4 half-sheets of paper, cut hamburger style. Then fold them into

shutters. Leave shutters as are on 2 of them (for right side booklets) and cut into 4 pieces on the

other 2 for left side booklets). Wait to label (see next 2 slides)

Page 4 Heart Structures—shutter labeling

Chambers ValvesI chose to use pink/red to color code right side structures and blue for right ones. That is optional, but encouraged to show which structures hold oxygenated blood.

Page 5 Heart Structures

Veins Arteries

Chambers

• How many? – FOUR (in humans)

• Job– Hold blood

Atria

Etymology: from Latin atrium "central court or main room of an ancient Roman house, room which contains the hearth” http://www.etymonline.com/index.php?term=atrium

• How many? – TWO

• Job– Receive blood

Right atrium

• Job– Receives blood from

whole body (blood that lacks oxygen)

Left atrium

• Job– Receives blood from

lungs (that picked up oxygen)

Ventricles

Etymology: From Latin word meaning “belly,” they make up most of the open/hollow portion of the heart

• Job– Push blood out of heart

(surrounded by muscle to help squeeze it out)

Right ventricle

• Job– Send blood to lungs (less

muscle needed because lungs are right next to the heart!)—sends it there to get oxygen

Left ventricle

• Job– Send blood to WHOLE

BODY to deliver oxygen and nutrients

Valves

• How many? – FOUR

• Job– Prevent backflow of

blood

Go here for info about valves and a good video about why they are necessary

Tricuspid Valve

• Etymology: Tri means 3 and cusp means points

• Job– Allows blood to flow

from RA to RV and not to flow back into RA

Pulmonary Valve

• Etymology: From Latin “pulmo,” meaning lungs—blood passing through this valve is headed to the lungs!

• Job– Allows blood to flow

from RV into pulmonary artery and not flow back into RV

Bicuspid (Mitral) Valve

• Etymology: Bi means 2 and cusp means points

• Job– Allows blood to flow

from LA to LV and not to flow back into LA

Aortic Valve

• Etymology: From Latin “to raise”

• Job– Allows blood to flow

from LV into aorta and not flow back into LV

Veins

• Job– Carry blood TO HEART– While MOST carry blood

lacking oxygen, not ALL do, so that is NOT a defining feature of veins

Vena Cavas

• Job– Carry blood to the RIGHT

SIDE of the heart– SUPERIOR (meaning

“above” carries it from the upper body—arms and head)

– INFERIOR (meaning “below” carries it from the lower body—abdomen and legs)

Pulmonary Veins

• Job– Carry blood from lungs

to LA (remember, pulmonary means lungs and veins come TO THE heart)

– What’s strange?• THEY ARE THE ONLY

VEINS THAT CARRY BLOOD WITH OXGYEN

• Right pulmonary vein– #4

• Left pulmonary vein– #6

Pulmonary Arteries

• Job– Carry blood to lungs

from RV (remember, pulmonary means lungs and arteries lead FROM THE heart)

– What’s strange?• THEY ARE THE ONLY

ARTERIES THAT CARRY BLOOD LACKING OXGYEN

• Right pulmonary artery– #1

• Left pulmonary artery– #3

Aorta

• Job– Carries blood leaving

heart to whole body (branches into many smaller arteries to do so)

Veins vs. Arteries

• Veins– Must prevent blood from

backing up– Have tiny valves

• Arteries– Must withstand high

pressure– Have thick walls

Heart Dissection

• Can you use what you’ve learned to interpret a REAL heart?? (this goes onto panel 6)