Answer:
Cge tulog yan ! Hahahahahha
Answer: to live
Explanation:
Your heart cannot beat if your brain and the nervous system does not work together to send a signal and tell it to beat. It’s the same way with the other organs in your body.
Vitamins are organic substances because you get your vitamin D from the sun and the sun is not artificial is it. So that is false
Answer:
Answers are explained below...
Explanation:
1. A muscle fiber is composed up of myofibrils that contain an arrangement of sarcomeres (A sarcomere is the basic contractile unit of a myofibril...)
Moreover a sarcomere also contains actin and myosin filaments for relaxation and contraction of a muscle as a whole.
2. The motor unit of a muscle is composed up of a neuron called as motor neuron (you can guess by it's name that it serves some motor function). The axonal endings of a motor neuron are embeded in a muscular fiber. A series of nerve impulses control the action of muscle.
Sorry because of time limit...