Ch. 39 - Circulatory System - USD 388 Ellis, KS

Ch. 39 - Circulatory System - USD 388 Ellis, KS

Ch. 47 Circulatory System Draw the heart SA node top (pacemaker) AV node bottom pg. 995 Blood Pressure Systole top reading Diastole bottom reading 120/80 pg.996

Heart pg.994 Located under the sternum; about the size of a fist. Averages 72 beats/min Pumps 5.5 L of blood per minute. Protect with a sac-like membrane around it called the

pericardium. Divided into right & left sides by a septum. Causes of heart rate increase 1. Carbon dioxide 2. Increase in temperature 3. Hormones

4. Brain reflex (scared) Blood Vessels Artery, vein, capillaries pg. 991 Muscles in the vessels 1. Connective 2. Smooth 3. Endothelium Why is the artery thicker than

the vein? What is the largest blood vessel? Aorta, Why? Arteriesarteriolescapillaries venulesveins Vercose veins close to the skins surface Can cut or strip these out.

Pulmonary Artery only artery to carry Deoxygenated blood. Pulmonary Vein only vein to carry oxygenated blood. 3 subsystems of circulation 1. Coronary Circulation

Heart 2. Renal Circulation Kidney 3. Hepatic portal Circulation liver Blood Liquid tissue 9% body weight Average person has 5 Liters.

1. Plasma liquid portion 55% of the blood volume Sticky, straw-colored liquid 90% water 2. Red Blood Cells (erythrocytes) pg. 988 Formed in the liver, spleen, and bone marrow.

Flat disks with 2 concave surfaces. They help transport oxygen. Hemoglobin is a protein that forms with RBCs Molecule inside RBCs that transports oxygen. There are about 30 trillion RBCs

in the human body at once. They live for only about 130 days. About 2 million RBCs are regenerated every second. 3. White Blood Cells Ameboid movement Help defend the body against diseases.

Larger than RBCs They are phagocytes (engulf) WBCs carry antibodies that destroy foreign substances (colds & infections) 4. Platelets or throbocytes Start blood clotting process Live 7 to 11 days

Serum doesnt have clotting properties. Blood Types pg. 990 Antigens A,B,AB,O A antigen [A] , antibody [B] B antigen [B], antibody [A] AB antigen [A & B] , no antibody

O no antigen, antibody [A & B] Genotype A Ia Ia & IaIo B IbIb & IbIo AB IaIb O IoIo Universal receiver

AB Universal donor O Rh Factor pg. 991 Protein found in the blood, its a blood antigen. Named after the Rhesus monkey. 85% U.S. population positive

15% U.S. population negative Cant mix or it will agglutinate. Respiratory System Passage: - pg. 983 Nostrils, nasal passage, pharynx, trachea, bronchi, bronchi tubes, air sacs (alveoli)

What is the process of taking air into the lungs? Inhale What the process of letting air out? Exhale Your lungs holds about 6 L of oxygen Total Lung Capacity

You normally inhale about .5 L of oxygen. The maximum amount of air a person can inhale & exhale is 3500-ml Vital Lung Capacity The air you breathe in & out just sitting is 500-ml Tidal

Air The air you breathe in & then in some more is 1500-ml Complemental Air The air you breath out & then out some more is 1500-ml Supplemental Air The air that stays in your lungs

is 1000-ml Residual Air Respiration rate is the measurement of the # of times a person inhales & exhales in a minute. Men 15 16 Women & children 20 Exercise pg. 984 - 985

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