Answer:
Lack of friends can be a result of reading signals incorrectly. Many people think other people don't like them, so they don't like them in return and thus it goes on and on and before you know it, you hate that person, before you've even spoken to them. ... Friendship favours the brave.
The answer that you are looking for is A. Nephrons
A. Measure your heart rate before, and after workouts
Answer:
B. Sucking chest wound
Explanation:
A sucking chest wound occurs when a hole, of the size of a coin, is created in the chest cavity that protects the lungs, resulting in the collapse of the lung. Such hole can be created from injuries that involve the puncturing of the chest cavity by foreign objects such as from gunshot, stabs etc. When the lung becomes collapse as a result of a puncture in the chest cavity, the individual would try hard to suck for air while breathing. As the individual breathes in and out, hissing or sucking sound can be heard. Coughing out of blood may be observed too.
