The muscle system has several functions including locomotion, protection, and heat production. There are three main types of muscle: skeletal, cardiac, and smooth. Skeletal muscle is voluntary muscle that moves the bones and is composed of long, striated bundles that contract and relax. It comes in two forms - red muscle contains many mitochondria and contracts for long periods, while white muscle contracts quickly. Smooth muscle involuntarily controls internal organs like the digestive and urinary tracts. Cardiac muscle specifically controls the heart.

1. Muscle System
Damnjanović Ivana

3. Muscle System
 Function
 Locomotion
 Protection
 Heat production
30-40% of the animal’s body
is muscle

4. Skeletal muscle Cardiac muscle Smooth muscle

5. Muscle System
 Skeletal Muscle
Movement for the
bones
Voluntary movement
Composed of long,
striated bundles that
contract and relax

7. Muscle System
 Skeletal Muscle
Red Muscle
 Contain many mitochondria;
 Lots of blood; contract for long periods of time

10. Muscle System
 Smooth Muscle
Movement
 Controls movements of the
internal organs
 Involuntary.
Examples-- Digestive tract,
urinary tract

12. Muscle System

13. Muscle System
 Cardiac Muscle
Movement
 Muscles that control the heart