Why is eggshell a good material for edta to chelate

The lab have to be filled out in your own words, However, there are papers you can use to go by on the internet. I attend Straighterline the class is BIO 202L (A and P 2.)
Both labs require you to fill paperwork during experiments. My school uses Turnit and the paper cannot be more than 27% of exactly matched content or it's flagged for plagiarism. I will insert all the pictures if you can just fill in all the questions for me. The Answers must be written in RED.
Lab 10 Blood and the Heart BIO202L Student Name: Click here to enter text. Access Code (located on the lid of your lab kit): Click here to enter text. Pre-Lab Questions: “1. Research the process of erythropoiesis, and explain the role erythropoietin plays. Why is this a popular “doping” drug for athletes? “ Click here to enter text. “2. How would the hemoglobin content differ in a person living in Philadelphia (Elevation: 39 feet) compared to someone living in Denver (Elevation: 5280 feet)? Why? “ Click here to enter text. Experiment 1: Heart Valves and Pumps Table 2: Experimental Observations Observations (with valve) and mL H2O Displaced? Observations (without valve) and mL H2O Displaced? Click here to enter text. Click here to enter text. Post-Lab Questions “1. What happened when you pressed on the balloon stretched over the jar? What does this result represent? “ Click here to enter text. “2. What structure in this experiment mimics a heart valve? “ Click here to enter text. “3. How did the valve influence the experimental results? If possible, indicate the difference (in mL) in water displaced with the valve versus without the valve. Does the valve enhance the water flow, and why? “ Click here to enter text. “4. What other organs or body systems incorporate valves? How are they used? “ Click here to enter text. Lab 10 Blood and the Heart BIO202L Experiment 2: Effect of Chelation Therapy on Arterial Plaque Levels Table 3: Eggshell Observations Day Water Observations 4% EDTA Observations 8% EDTA Observations 1 Click here to enter text. Click here to enter text. Click here to enter text. 2 Click here to enter text. Click here to enter text. Click here to enter text. 3 Click here to enter text. Click here to enter text. Click here to enter text. 4 Click here to enter text. Click here to enter text. Click here to enter text. 5 Click here to enter text. Click here to enter text. Click here to enter text. 6 Click here to enter text. Click here to enter text. Click here to enter text. 7 Click here to enter text.