The Skeletal System
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The skeletal system is made up mainly of bones. Bones are light, but also hard and strong. An adult human has
about 206 bones.
The skeletal system also includes cartilage. Cartilage is a smooth tissue between bones. It keeps the bones from
rubbing against one another.
Ligaments connect one bone to another. Ligaments are bands of strong and stretchy tissue.
The skeleton has two important jobs. First, it forms a strong framework that gives your body its shape. Second,
the hard bones of the skeleton protect your internal organs.
The Nervous System
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Your nervous system controls all activities in your body. It directs your muscles to move your skeleton.
The nervous system is made up of bundles of fibers called nerves. The nerves form a network of pathways in the
body. The pathways carry signals back and forth through the body.
The central nervous system is the master controller of the body. It has two parts: the brain and the spinal cord.
The brain is the body's main control center. It receives signals from the senses.
The spinal cord is a thick cable of nerves. The brain is connected to the spinal cord at the base of the skull. The
spinal cord runs down the backbone, or spine.
The peripheral nervous system carries signals sent between the central nervous system and the rest of the body.
Many signals are sent to the brain from the sense organs. Sense organs include the eyes, ears, and touch
sensors in your skin.
The peripheral nervous system sometimes acts by itself without signaling the brain. These reactions are called
reflexes.
The Skeletal System




The skeletal system is made up mainly of bones. Bones are light, but also hard and strong. An adult human has
about 206 bones.
The skeletal system also includes cartilage. Cartilage is a smooth tissue between bones. It keeps the bones from
rubbing against one another.
Ligaments connect one bone to another. Ligaments are bands of strong and stretchy tissue.
The skeleton has two important jobs. First, it forms a strong framework that gives your body its shape. Second,
the hard bones of the skeleton protect your internal organs.
The Nervous System








Your nervous system controls all activities in your body. It directs your muscles to move your skeleton.
The nervous system is made up of bundles of fibers called nerves. The nerves form a network of pathways in the
body. The pathways carry signals back and forth through the body.
The central nervous system is the master controller of the body. It has two parts: the brain and the spinal cord.
The brain is the body's main control center. It receives signals from the senses.
The spinal cord is a thick cable of nerves. The brain is connected to the spinal cord at the base of the skull. The
spinal cord runs down the backbone, or spine.
The peripheral nervous system carries signals sent between the central nervous system and the rest of the body.
Many signals are sent to the brain from the sense organs. Sense organs include the eyes, ears, and touch
sensors in your skin.
The peripheral nervous system sometimes acts by itself without signaling the brain. These reactions are called
reflexes.
The Skeletal System




The skeletal system is made up mainly of bones. Bones are light, but also hard and strong. An adult human has
about 206 bones.
The skeletal system also includes cartilage. Cartilage is a smooth tissue between bones. It keeps the bones from
rubbing against one another.
Ligaments connect one bone to another. Ligaments are bands of strong and stretchy tissue.
The skeleton has two important jobs. First, it forms a strong framework that gives your body its shape. Second,
the hard bones of the skeleton protect your internal organs.
The Nervous System








Your nervous system controls all activities in your body. It directs your muscles to move your skeleton.
The nervous system is made up of bundles of fibers called nerves. The nerves form a network of pathways in the
body. The pathways carry signals back and forth through the body.
The central nervous system is the master controller of the body. It has two parts: the brain and the spinal cord.
The brain is the body's main control center. It receives signals from the senses.
The spinal cord is a thick cable of nerves. The brain is connected to the spinal cord at the base of the skull. The
spinal cord runs down the backbone, or spine.
The peripheral nervous system carries signals sent between the central nervous system and the rest of the body.
Many signals are sent to the brain from the sense organs. Sense organs include the eyes, ears, and touch
sensors in your skin.
The peripheral nervous system sometimes acts by itself without signaling the brain. These reactions are called
reflexes.
Be Good to Your Brain
So what can you do for your brain? Plenty. Directions: Based on what you
learned in the article list 5 ways that you can BE GOOD TO YOUR BRAIN.
Tell why you think each thing is good for your brain.
1.
2.
3.
4.
5.