The Skeletal, Muscular, And Nervous System: March 2009

FUNCTIONS OF THE CARDIOVASCULAR SYSTEM

THIS IS COMPOSED OF THE HEART AND ALL THE BLOoD VESSELS OF THE BODY.

Structure Of The Cardiovascular System

THE HEART-The heart and the brain are perhaps the most important organs in your body.Chambers Of The Heart-There are four chambers in the heart. Each of two smaller chambers is called an atrium. The two larger,lower chambers are called ventures.

Circulation In The Heart

Blood

Blood delivers oxygen,hormones,and nutrients to the cells and carriesaway wastes that the cell produce. About 55 percent of total blood.

RED AND WHITE BLOOD CELLS

Red blood cells transport oxygen to the cells and tissue of the body. White blood cells protect the body from infections and fight infections when they occur.

Blood Vessels

There are threee main types of blood vessels: arteries, cappillaries, and veins. There are more than 60,000 miles that transport blood.

ARTERIES

This is blood vessels that cary blood away from the heart. They have thick elastic walls tha tcontain smooth muscle fiber.

CAPILLARIES

Small vessels that carry blood between arterios and vessels called venules. They form an extensive througout tissue and organs.

VEINS

BLOOD VESSELS THAT RETURNTO THE HEART.

Platelets

are cells that prevent the body's loss of blood. They gather at the site of an injury and release chemicals.

Lymph

Clear fluid that fills the spaces around body cells. It is transported by the lymphatic system to the heartand returns to the blood.

B-Cells And T Cells

B cells are lymphocytes that stimulate to multiply,T cells enlarge than multiply

CARE AND PROMBLEMS OF THE CARDIVASCULAR SYSTEM

Teen years are the best times to take care of the cardivasculr system

The Skeletal System

http://video.google.com/videosearch?q=the+skeletal+system&hl=en&emb=0&aq=f

The skeleton is a strong, flexible framework that supports the body and protects the infornal or glands.
Consist of 206 bone

AXIAL is made up of the bones of te head, neck, and trunk.

APPENDICULAR is made up of the bone sof the arms and legs and their supports

TYPES OF BONES

Long Bones are bones in your legs and arms.

Short Bones are almost equal in lenghts and width (wrists and ankles)

Flat Bones are somewaht thinner and much flatter than other bones, they are located inthe skull . The scapula or shoulder blade is an example of a flat bone

Irregular Bones are irregularly shaped bones such as some facial bones or verebrae

CARTILAGE

Is a strong, flexible connective tissue it is another component of your skeletal system.

JOINTS

Joints are points at which bones meet.

Ball and socket joints are formed when the rounded head of one bone fits into the rounded cavity of an adjoining bone

Pivot Joints allow limited rotation ot turning of the head.

Ellipsoidal Joints such as the one in your wrist have an oval shaped part and is curved

CARING FOR YOUR SKELETAL SYSTEM

Caring for your skeletal system is important so your body will not get skeletal disorder.

FRACTURES is any type of break in a bone

OSTEOPOROSIS

Condition in which proggressive loss of bone tissue accurs

SCOLIOSIS

Lateral or side to side curvature of the spine

INJURIES TO JOINTS

Dislocation-results when the ligaments that attach the bone at the joint are torn

Torn cartlidge-can result from a sharp bow or the twisting of a joint.

REPETITIVE MOTION INJURY

This is damage to tissue caused by prolonged repeated movements such as sewing or computer work

THE MUSCULAR SYSTEM

TYPES OF MUSCLES-SMOOTH MUSCLES act on lining of passageways and internal organs. SKELETAL Muscles are attached to bone and cause body movements. FLEXOR is a muscle that close a joint. EXTENSOR is a muscle that opens a joint. CARDIAC MUSCLES is a type of straited muscle that forms the wall of the heart.