Bio100_Chap_11_Blood_Sum_10

Bio100_Chap_11_Blood_Sum_10 - Human Biology Chapter 11...

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Human Biology Chapter 11
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Circulation
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Blood Function Transportation Transports all substances Oxygen from lungs Nutrients from digestion Hormones from the endocrine glands Wastes to elimination areas
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Blood Function Regulation – Helps regulate –Body temperature –Volume of water in the body –pH of body fluids
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Blood Function Defense – Contains defense cells –Protect against illness and infection – Prevents excessive blood loss – Blood clotting
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Blood Adult men average 5-6 liters of blood, women 4-5 liters On the average blood is about 8% of your body weight “Blood is thicker than water” and sticky
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Components of Blood
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Components of Blood * Formed Elements (45%) Red blood cells Carry oxygen to tissues, CO 2 ay away White blood cells Defend body against invasion and abnormal cells Platelets Take part in blood clotting Part of defense mechanisms
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Components of Blood * Plasma (55%) Water Electrolytes (ions) Na+, K+, chloride, Ca++ Proteins lbumins 90% of Plasma is water Albumins Maintain blood volume Transport electrolytes, hormones and wastes Hormones Insulin, growth hormone, testosterone, estrogen Messengers that transport messages Gases Oxygen, carbon dioxide (dissolved in plasma) Nutrients and wastes
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Bio100_Chap_11_Blood_Sum_10 - Human Biology Chapter 11...

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