Chapter 18 Lesson 1 Vocabulary Page: 478-482 Pathogens- Disease-causing organisms that are so small they can only be seen through a microscope. Infections- A condition that occurs when pathogens enter the body, multiply, and cause harm. Viruses-

Tuberculosis

A bacterial disease that usually affects the lungs.

Skeletal system

A body system made up of bones, joints, and connective tissue.

Immune System

A combination of body defenses made up of the cells, tissue and organs that fight off pathogens and diseases.

Infections

A condition that occurs when pathogens enter the body, multiply, and cause harm.

Vaccine

A preparation of dead or weakened pathogens that causes the immune system to produce

Vaccine

A preparation of dead or weakened pathogens that causes the immune system to produce antibodies.

Lymphatic System

A secondary circulatory system that helps the body fight pathogens and maintains its fluid balance.

Pneumonia

A serious inflammation of the lungs

Marrow

A soft tissue in the center of some bones

Strep Throat

A sore throat caused by streptococcal bacteria.

Cartilage

A strong flexible, gel-like tissue that cushions your joints.

Mononucleosis

A viral disease characterized by a severe sore throat and swelling of the lymph glands in the neck and around the throat area.

Hepatitis

A viral disease of the liver characterized by yellowing of the skin and the whites of the eyes.

ball & socket joints

Allow bones to move in all directions

hinge joints

Allow movement in one direction.

pivot joints

Allow movement with limited rotation

Vector

An organism, such as an insect that transmits pathogens

Antigens

Any substance released by invading pathogens

Hygiene

Cleanliness.

Ligament

Cordlike tissues that connect the bones in each joint.

Pathogens

Disease-causing organisms that are so small they can only be seen through a microscope.

gliding joints

Help bones slide over one another without twisting

Protozoa

One-celled organisms that are mor4e complex than bacteria

Fungi

Organisms that are more complex than bacteria but can't make there own food.

Antibodies

Proteins that attach to antigens, keeping them from harming the body

Inflammation

The body's response to injury or disease, resulting ins a condition of swelling, pain,heat, and redness.

Contagious Period

The length of time that a particular disease can be spread from person to person.

Joints

The point at which two bones meet

Viruses

The smallest pathogens

Lymphocytes

The white blood cells in the lymphatic system

Bacteria

Tiny one-celled organisms

Tendons

Tough bands of tissue that attach your muscles to bones

Immunity

Your body's ability to resist the germs that cause particular disease.