Ahuman red blood cell in an artery of the left arm is on its way to deliver oxygen to a cell in the thumb. from this point in the artery, how many capillary beds must this red blood cell pass through before it returns to the left ventricle of the heart?

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas

Which statements describe resources? one of the factors people use when deciding where they will live is the availability of resources. renewable resources have little value for people. resources are unevenly distributed throughout the world. energy is the world resource which has the highest use. the use of nonrenewable resources has decreased in recent history. the use of resources is evenly distributed throughout the world. the world's oil supply will last for the next forty years if its use continues as expected.

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.