because if they dont they not hold somthing
lungs and muscles
Muscles do is to command the bones to move and you need food and energy to move around.
Flowers, being simpler forms of life as compared to humans, do not require muscles. They do not need to move to survive.
Volintary Muscles.
animals have 4 big muscles, but humans have 6 muscles. Humans have 6 muscles to roll our eyes .
Glycogen is the stored reserve of sugar in the body. It is converted into glucose if our muscles need to respire.
muscles
skin
Cats, because of their predatory nature, have many muscle that humans do not have. However, the majority of the muscles as essentially the same.
Ear muscles are considered vestigial in humans because they are remnants of muscles that were once used to move the ears in order to better detect sounds, a function that is no longer necessary for survival in modern humans.
you need muscles to move...
Yes, a caterpillar has around 4000 muscles, compared to 692 for humans