Answer:
Accuracy is the closeness to the specific target and precision is the closeness of the measurements to each other.
The valves stop the blood from flowing backwards
OD.......................
Answer:
Explanation:
They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. Cells also contain the body's hereditary material and can make copies of themselves. Cells have many parts, each with a different function.
