SOMEONE PLS HELP, ILL GIVE BRAINLIEST AND 50 POINTS PLS I NEED ALL ANSWERS also dont mind the missing questions, i already answered those

1) Your heart provides your body with and it needs. It also carries away .

2) Your heart fills with blood. Then its muscle to squirt the blood along. When the heart , it squeezes and sends the blood to other parts of your body.

4) The heart has several valves. What is their function (job)?

5) Think about why blood flowing backwards in the body would not be good for you. Give one reason it would be a bad thing to happen.

6) What is the main difference between arteries and veins?

7) What is the main waste material that the blood picks up to be removed from the body?

Asmall (but heavy) particle placed in a glass of water will follow a zigzag motion because the particle will bounce off of the water molecules it meets. this is called brownian motion. a physicist simulates this on a computer, by varying the distance a particle can travel (called the mean free length), on average, before it collides with a water molecule and assigning the change in motion to be one of 8 directions, each with a similar probability. by running the simulated particle (with the same mean free length) many times she determines that it should take 15 seconds, on average, for the particle to fall to the bottom, with a standard deviation of 1.5 seconds. next she lets a real particle fall through a glass of water and finds that it took 18 seconds. what does she conclude, and why?

Acertain population of bacteria demonstrates exponential growth doubles in size every 4 days. how long will it take the population to triple in size?

Abc will undergo two transformations to give aa'b'c' which pair of transformations will give a different image of aabc if the order of the transformations is reversed? a. a rotation 90' counterclockwise about the origin followed by a reflection across the y-axis b a translation 5 units down followed by a translation 4 units to the right c. a reflection across the x-axis followed by a reflection across the y-axis a rotation 180'clockwise about the ongin followed by a reflection across the y-axis reset next 2 omentum all rights reserved o atk me anything o o e