30.5 Blood KEY CONCEPT Blood is a complex tissue that transports materials.

30.5 Blood

13.1 Ecologists Study Relationships Blood Functions Pick-up Wastes: Oxygen from the lungs Carbon Dioxide from the cells Urea from the kidneys Heat released through skin Deliver: digested nutrients-proteins, fats, carbohydrates, vitamins and minerals Oxygen Hormones-chemical messengers

30.5 Blood Blood is composed mainly of cells, cell fragments, and plasma. Whole blood is made up of different materials. –plasma –red blood cells –white blood cells –platelets red blood cells, white blood cells, and platelets plasma

30.5 Blood Plasma is a key factor in maintaining homeostasis. –molecules diffuse into and out of plasma –contains proteins that stabilize blood volume –contains clotting factors –contains immune proteins

30.5 Blood Platelets and different types of blood cells have different functions. The bone marrow manufactures most of the blood components. red blood cell platelet white blood cell

30.5 Blood Cell parts that aid in forming blood clots 250,000 per drop Small, circular, no nucleus Made in bone marrow form cells that break apart Live five days Disease- Hemophilia- genetic disorder where blood does not clot. Platelets

30.5 Blood Red blood cells make up % of all blood cells. –transport oxygen to cells and carry away carbon dioxide –have no nuclei and contain hemoglobin

30.5 Blood Red Blood Cells a. Living, round cells that contain a nucleus that dissolves. b. 5,000,000 per drop c. Live around 120 days d. Contain hemoglobin e. Carry oxygen to body cells f. Made in bone marrow- the soft center part of long bones. Problem-Anemia-weak, tired, short of breath

30.5 Blood White blood cells fight pathogens and destroy foreign matter. red blood cell platelet white blood cell

30.5 Blood White Blood Cells a.Destroy harmful microbes b.Remove dead cells c.Make proteins that prevent diseases (antibodies) d.Larger than RBC and do have a nucleus e.Can leave the capillaries f.8,000 per drop g.Make in bone marrow, spleen, thymus gland and tonsils h.Live-it varies-from 10 days, months, or years Disease-Leukemia-increase in number but nonfunctioning

30.5 Blood Protein markers define blood types and Rh factors. –ABO blood group the most common –Rh factor can be negative or positive –blood types must be compatible for transfusions

30.5 Blood Platelets help form clots that control bleeding. platelets fibrin red blood cell white blood cell

30.5 Blood Open book to page 926 Define the terms on page 926 Fead the chapter Answer the questions on p. 929 # 1-5