Heart Anatomy By: Heidi Hisrich

Orientation Which side is left? Which side is left?

External Anatomy—panel 1 Aorta Pulmonary arteries Pulmonary veins Superior Vena Cava Left atrium Coronary Artery—”feeds” the heart itself (can only see from anterior/front view), coronary means “crown/wreath” and surrounds heart like a crown Right atrium Inferior Vena Cava Left ventricle Right ventricle Apex (from Latin, “point/tip,” points toward left)

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

Left side: Systemic Pump Right side: Pulmonary Pump Heart Flow—panels 2-3 Video showing blood flow 3D animation Really corny video quiz—test yourself Left side: Systemic Pump Right side: Pulmonary Pump

Heart Structures—panels 4-5 To 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) Booklet insides Left side style Right side style

Page 4 Heart Structures—shutter labeling Chambers Valves I 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 How many? Job TWO Receive blood 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? Job FOUR 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 Right pulmonary vein Left pulmonary vein 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 Right pulmonary artery Left pulmonary artery 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 Arteries 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)