Presentation on theme: " Warm-up 5/16: Name four parts of the digestive system and state their function. Notes: Lymphatic System, Blood & Non-Specific Immune pp 940-942."— Presentation transcript:
Warm-up 5/16: Name four parts of the digestive system and state their function. Notes: Lymphatic System, Blood & Non-Specific Immune pp
Function: carries fluids that collect in tissues to blood stream
Structures a. the fluid that moves through the lymphatic vessels lymph b. fluid moves by muscle contractions c. nodes filter microorganisms, tissue, and foreign junk d. lymphocytes: specialized white blood cells that fight disease
transports nutrients, O 2, CO 2, & waste defends the body against disease
plasma: liquid medium red blood cells (erythrocytes): transport CO 2 and O 2 white blood cells (leukocytes): defend against disease platelets: form blood clots
made of 90% water, sugar, salts, amino acids, vitamins, minerals yellow in color
most common in the blood made in red bone marrow made of iron-containing hemoglobin lack of nucleus leaves space to transport materials
form in red bone marrow but mature in the lymph nodes many types of white blood cells
partial cells formed in bone marrow release chemicals to attract a protein called fibrin to make clots
Fights pathogens to prevent infections and disease Works with the lymphatic system (collects fluid and returns it to the blood)
Bone marrow: produces blood cells Lymphocytes: white blood cells (wbc) Lymph nodes: stores wbc Thymus: matures wbc Spleen: contains wbc that clean out pathogens as blood filters through
pathogens: cause disease 1. viruses: protein shell containing DNA or RNA 2. bacteria 3. Fungi (spores) 4. Parasites 5. Toxins (snake bites etc) 6. allergens: cause allergies
Study page 957
Protects body against any pathogen, regardless of the pathogen’s identity.
Skin: block entry mucous membranes: trap pathogens and move them out of the body stomach acids: destroys pathogens
Inflammatory response 1. Injured cells release a chemical signal called histamine to increase blood flow to area 2. platelets cause clotting trapping pathogens 3. Area swells, becomes warm, and macrophages/phagocyte (wbc) move in and engulf bacteria
interferons: enzymes that stop virus protein production fever: slow growth of bacteria or increase activity of wbc
Non-specific Immune Poster Exam: Human Bio #2 Friday May 23, 2014 Intervention Wednesday 5/21 & Thursday 5/22 from 2:45pm to 3:30 pm.
lymphatic system spleen lymphocytes 1. B-cells: wbc that mature in bone marrow 2. T-cells: wbc that mature in thymus
wbc have receptors to the antigens (pieces of a pathogen) that cause an immune response
2-part attack: cell mediated and humoral Starts with an initial response Cell-mediated: Killer T-Cell production Humoral: B-Cell production Initial response Humoral B-Cell production Cell-mediated T-Cell production
macrophage engulfs pathogen and puts antigens on its surface Helper T-cell binds to antigen
Macrophage releases a chemical (INK-1) which causes the Helper T-cell to release INK-2
Initial response Humoral B-Cell production Cell-mediated T-Cell production INK-2
INK 2 stimulates the production of more Helper T Cells and production of Cytotoxic T Cells Cytotoxic T Cell (killer T cell): punctures and kills infected body cells.
Initial response Humoral B-Cell production Cell-mediated T-Cell production
IN-2 causes B-cells to divide Most B-cells change to plasma cells plasma cells produce and secrete antibodies Y-shaped protein that deactivates viruses, and clumps them making it easier for macrophages to engulf and destroy them
Some B-cells become memory cells (Body’s long term defense system) When exposed to a pathogen a 2 nd time memory cells immediately recognize and destroy it before it causes illness.
Study Guide Due Tuesday Tracing Pathway of immune Response due Wednesday