Which artery do you think is made of thicker muscle, the aorta or the pulmonary artery? why? refer back to your heart box to visualize the path of these vessels.

Describe characteristics of a good respitory surface

Explain the causes and effect of damage to the genetic code.

When does a spring tide occur? question 9 options: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall. they occur on the date of the vernal equinox each year, no matter what stage the moon is in. this is why they are called spring tides. they occur when the sun, moon, and earth are at 45-degree angles from each other. this happens once every spring. they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur all year long.