1 5 blood components, disease of the circPresentation Transcript
DO NOW Compare and contrast the functions of arteries, capillaries, and veins. Why does the dif fusion of materials between blood and body cells occur across capillary walls but not veins or arteries?
Objective:How do thecomponents ofthe bloodfunction asstructures ofthe circulatorysystem?
WHAT ARE THESE? WHY? Vein Artery Capillary
REGENTS REVIEW The diagram represents several major circulatory pathways in the human body. Which sequence represents the normal blood flow in circulation to the lungs?1. 2 → 5 → 7 → 42. 4 → 8 → 1 → 63. 1 → 6 → 2 → 54. 5 → 7 → 3 → 8
WHAT ARE THE CONTENTS OF BLOOD? It’s about ½ Plasma Fluid in blood It’s about ½ cells and fragments of cells Red blood cells, white blood cells, platelets
CONTENTS OF BLOOD Plasma Fluid in blood 90% water 10% dissolved salts, nutrients, enzymes, and others …the “stuff” in between the cells; carries the cells
CONTENTS OF BLOOD Red blood cells Structure: Look like disks with thin centers Most numerous cells in blood Function: Transports oxygen via hemoglobin (this is why they are red)
CONTENTS OF BLOOD White blood cells – the “Army” of the circulatory system Structure: Large, white, “furry” Function: Guard against infection; fight bacteria, viruses An increase in WBC numbers tells doctors there is infection Can slip through capillary walls and go outside blood vessel
REGENTS REVIEW What is a major dif ference between red blood cells and white blood cells?1. Red blood cells contain hemoglobin, but white blood cells do not.2. Red blood cells can move, but white blood cells cannot.3. Red blood cells contain nuclei, but white blood cells do not.4. Red blood cells engulf foreign bacteria, but white blood cells do not.
CONTENTS OF BLOOD Platelets Structure: Fragments of cells that can connect and clot Function: Stops cuts and scrapes from continuing to bleed When in contact with broken blood vessels, stick to wound
NAPPY’S REVIEW The breaking of blood vessels would result in using platelets in the1. synthesis of hemoglobin2. formation of a clot3. release of antibodies4. deamination of amino acids
REGENTS REVIEW The normal sodium level in human blood is 135 mEq/L. If a blood test taken immediately after a meal reveals a sodium level of 150 mEq/L, what will most likely result?1. Antibody production will increase.2. The person will move to an ecosystem with a lower sodium level.3. The nutritional relationships between humans and other organisms will change.4. An adjustment within the human body will be made to restore homeostasis.
REGENTS REVIEW Which two systems function in filtering fluids in our bodies?1. Digestive, Nervous2. Digestive, Circulatory3. Excretory, Circulatory4. Excretory, Respiratory