A strain means to like pull or stretch something to an extreme or damaging degree. So, when you sprain your ankle or something is when you do something strenuous to that body part that usually ends in pain (ouch). I hope this helps!
Assumption? Are there any choices? Hope this helps though.
Answer: a, b, c (this one is debatable), d, e, f
The skeletal system works as a support structure for your body. It gives the body its shape, allows movement, makes blood cells, provides protection for organs and stores minerals. The skeletal system is also called the musculoskeletal system
Answer:
1. The heart pumps about 100 gallons of blood through the body each hour – enough to fill 1,600 drinking glasses.
2. During the average lifetime, a heart pumps 1 million barrels of blood, enough to fill more than 3 supertankers
3. Every year, your heart beats approximately 35 million times. That is 100,000 beats per day and 70 beats per minute.
4. Your heart doesn’t stop when you sneeze, but a sneeze can briefly change its rhythm.
Explanation: