Pulmonary valve. The pulmonary valve normally acts like a one-way door from your heart’s right ventricle to the lungs. Blood flows from the right ventricle through the pulmonary valve to the pulmonary artery and then into the lungs, where it picks up oxygen to deliver to your body

Aorta. The aorta is the largest artery in the body. It carries oxygen-filled blood from the heart to different organs in the body. The aorta starts at the heart’s left ventricle, arches upwards towards the neck, then curves back downward, extending into the abdomen.

References:
https://www.verywellhealth.com/aorta-anatomy-4588336#:~:text=The%20aorta%20is%20the%20largest,downward%2C%20extending%20into%20the%20abdomen.
https://www.mayoclinic.org/diseases-conditions/pulmonary-valve-disease/symptoms-causes/syc-20350654#:~:text=The%20pulmonary%20valve%20normally%20acts,to%20deliver%20to%20your%20body.
https://www.verywellhealth.com/endocardium-definition-5088789#:~:text=The%20endocardium%20is%20a%20thin,and%20contains%20necessary%20blood%20vessels.