Here They Are: Your Body Systems (Part 1).

And Your Body Systems (Part 2)

Your Muscular System

Types of Muscles Your body has three types of muscle tissue—skeletal muscle, smooth muscle, and cardiac muscle. Functions: 1.Provides the body and skeleton with its ability to move 2.Maintains body’s vertical posture

Skeletal Muscle Skeletal muscles are attached to the bones of your skeleton. Because you have conscious control of skeletal muscles, they are classified as voluntary muscles. These muscles provide the force that moves your bones. Skeletal muscles react quickly and tire quickly. At the end of a skeletal muscle is a tendon. A tendon is a strong connective tissue that attaches muscle to bone. Note- ligaments connect bones together.

Smooth Muscle Smooth muscles are called involuntary muscles because they work without your conscious effort.

Cardiac Muscle Cardiac muscles are involuntary muscles found only in the heart. Cardiac muscles do not get tired. A Cardiac Muscle Cell

Voluntary Muscles The muscles that are under your direct control are called voluntary muscles. Smiling and turning the pages in a book are actions of voluntary muscles.

Involuntary Muscle Action The muscles that are not under your conscious control are called involuntary muscles. Your colon (left) is lined with smooth muscle, and your heart (right) is comprised of cardiac muscle which works automatically pumping blood around your body.

Anatomy Of A Muscle

Your Skeletal System

Your Skeleton’s Functions Your skeleton has five major functions. 1. provides a frame and support for your body 2. enables you to move, 3. protects your internal organs 4. produces blood cells 5. stores certain materials until your body needs them

The Structure of Bone Many bones have the same basic structure. A thin, tough membrane covers all of a bone except the ends. Blood vessels and nerves enter and leave the bone through the membrane. Beneath the membrane is a layer of compact bone, which is hard and dense, but not solid. Small canals run through the compact bone, carrying blood vessels and nerves from the bone’s surface to the living cells within the bone. Just inside the compact bone is a layer of spongy bone, which has many small spaces within it.

Bone Anatomy