MS AGUIRRE A CH 1LES 3

BONES- ARE LIVING ORGANS MADE OF CONNECTIVE TISSUES THE TISSUES INCLUDE AN OUTER PROTECTIVE MEMBRANE, A LAYER OF HARD MATERIAL AND A SOFT CENTER CONTAINING BONE MARROW

BONE MARROW IS CONNECTIVE TISSUE THAT PRODUCES RED BLOOD CELLS AND WHITE BLOOD CELLS

YOUR BODY CONTAINS SEVERAL KINDS OF BONES

BONES MEET AT THE JOINTS WHERE THEY ARE ATTACHED TO EACH OTHER AND TO MUSCLES. Different types of joints allow for different types of movement. Back and forth, circular, or skull has immovable

SKELETAL SYSTEM This skeleton provides support to your body Skull protects the brain

MUSCLES ATTACH TO BONES BY TENDONS Tendons are tough bands of connective tissue

BONES ARE ATTACHED TO EACH OTHER BY LIGAMENTS THEY ARE BANDS OF CONNECTIVE TISSUE THAT HOLD THE SKELETON TOGETHER

HUMAN BODIES HAVE 206 BONES

27 bones 26 bones

HUMAN SKULL BONES = 23 BONES

SKELETON IS ALSO MADE OF CARTILAGE Ears and tips of nose made of this

MUSCULAR SYSTEM Three kinds of muscles Voluntary, smooth and cardiac Voluntary- moves bones and hold skeleton upright Smooth- contract slowly and move substances through the organs Cardiac- make up the walls of the heart

NERVOUS SYSTEM Allows you to experience things and react to your environment.

THE CENTRAL NERVOUS SYSTEM Made up of the brain and spinal cord (as thick as a pencil)

PERIPHERAL NERVOUS SYSTEM Consists of sensory organs, such as the eyes, ears and body nerves. Nerves are bundles of nerve cells or neurons (specialized cell that can receive signals and transmit them to other neurons

RECEPTORS ARE NERVE CELLS THAT DETECT CONDITIONS IN THE BODY’S ENVIRONMENT Sound waves Heat and cold pressure

MOUTH-TASTE AND EYES COLOR AND LIGHT

REFLEXES- AUTOMATIC RESPONSES TO SITUATIONS