What wave is the purple/blue arrow pointing What does that wave represent What is happening in the set of waves on top

The red highlighted vessel is the R and it runs adjacent (alongside) the R There is are L and R internal and external arteries and veins. Hint it the external ones that becomes the “red highlighted” vessel above.  What are the visible vessels that run horizontal (sideways)L and R arteries and veins

In each cardiac cycle deoxygenated blood enters

Blood is a type of which tissue?

The magnitude of the heats of vaporization, fusion and sublimation of a substance reflect the  

Microplastics can come from

When 15.0 g of zinc metal reacts with excess HCl, how many liters of H2 gas are produced at STP?

A 75.0 L steel tank at 20.0°C contains acetylene gas, C2H2, at a pressure of 1.39 atm. Assuming ideal behavior, how many grams of acetylene are in the tank?

Which of the following is true according to the reading?

All plastics float.