Describe the function of muscle tissue.

(N/A) Muscle tissue is primarily responsible for movement in the body. Its key functions include:
$1$. Movement: Muscle tissue enables voluntary movements (like walking or lifting objects) and involuntary movements (like the beating of the heart or peristalsis in the digestive tract).
$2$. Posture Maintenance: Muscles maintain body posture and stabilize joints by providing constant tension.
$3$. Heat Production: Muscle contraction generates heat,which is essential for maintaining body temperature ($37^{\circ}C$ in humans).
$4$. Protection: Muscles provide a protective layer for internal organs and bones.