Answer:
1 = veins
2 = cardiovascular system
3 = fibrin
4 = target heart rate
5 = maximal heart rate
<span>Taking the club drug Ecstasy while pregnant can interfere with the baby's motor development after birth, a new study finds. The drug also seems to raise the odds of having a baby boy.</span>
Chlamydia is a primary pathogen
Explanation:
Measurement system, any of the systems used in the process of associating numbers with physical quantities and phenomena. Although the concept of weights and measures today includes such factors as temperature, luminosity, pressure, and electric current, it once consisted of only four basic measurements: mass (weight), distance or length, area, and volume (liquid or grain measure). The last three are, of course, closely related.
