Body Systems - Lecture 11

Flashcards about Body systems and immune system.

Immunity

Resistance to infection, invasion by virus, bacteria, fungi, protozoan

Innate Nonspecific Immune System

First and second line of defense

Inflammation

Response to tissue damage which causes redness (RBC), swelling, and warmth at the site due to increase in cells and fluids

Lymphocytes

White blood cells made in the bone marrow

B cells

Mature in bone marrow and produce antibodies

Antigen binding site

Specific binding site to attach to the invader

Antibody Mediated Immunity

Made by plasma cells to bind to antigens causing clumping and then macrophages destroy the antigens

Primary immune response

Antigen exposure causes rapid division of plasma cells into Antibodies- takes 7-14 days for maximum amt. of Antibodies to be made. Many of the stimulated B cells become memory cells.

Secondary immune response

After re-exposure to SAME Antigen, memory cells make Antibodies in 2-6 days.

T cells

Mature in the thymus & divide into Killer T cells, Helper T cells and Suppressor T cells.

Pathogen

Disease-causing microbe

Inborn immunity

Resistance to nonhuman diseases before birth.

Acquired immunity

Resistance developed after birth.

Passive immunity

Antibody put in AND NOT in response to Antigen- temporary.

Active immunity

Antibody made by the body in response to Antigen- more permanent immunity.

Allergic reactions

Caused by hypersensitivity (hyperactive immune response).

Autoimmunity

Ab or T cells bind to “self” cells due to gene susceptibility & environment

Respiratory System

Takes in oxygen from the air and expels carbon dioxide as waste

Circulatory System

Carries oxygen, nutrients, and waste throughout the body

Right atrium

Collects deoxygenated blood from the body

Right ventricle

Pumps deoxygenated blood to the lungs

Left atrium

Collects oxygenated blood from the lungs

Left ventricle

Pumps oxygenated blood to the body