Which vein below is located in the chest?

What is the name of the vessel labeled #72? IMG_0204.jpg

What is #7? Screen Shot 2020-04-21 at 10.20.52 PM.png

Where are trabeculae carneae located in the human body?

What is #3? Screen Shot 2020-04-21 at 10.20.52 PM.png

What is #9? Screen Shot 2020-04-21 at 10.20.52 PM.png

Which of the following veins IS NOT FOUND in the upper extremity?

What is #4? Screen Shot 2020-04-21 at 10.20.52 PM.png

What is #15? Screen Shot 2020-04-21 at 10.21.08 PM(5).png

What is the name of the pacemaker that sets the rate of the heartbeat in the heart and where is it located?