Answer:
The answer is A: first class lever
The answer is D . Hope this helps !
Blood! Cardiovascular system refers to the heart pumping blood around the body.
Smooth muscles are from <span>Involuntary muscles </span>
Answer:
not sure if this helps but. Concept development is a set of activities that are carried out early in the systems engineering life cycle to collect and prioritize operational needs and challenges, develop alternative concepts to meet the needs, and select a preferred one as the basis for subsequent system or capability development
