山东大学：《医学生理学 Medical Physiology》课程教学资源（PPT课件讲稿，人体生理学 Human Physiology）Chapter 4 Cardiovascular Physiology Section 1 The Heart as a Pump

CHAPTER 4 THE CARDIOVASCULAR SYSTEM Superior vena cava Arch of aorta Right pulmonary artery veIns Hight pulmonary L eft atrium Right ventricle Lott ventricle Inferior vena cava

CHAPTER 4 THE CARDIOVASCULAR SYSTEM

Weight of the heart 300g M VeACH Work: 75/min, 1000e Pumenoty turk beats /day Cerda renee 35 million beats /year. 2.5 Integer cera aal billion beats /life 70ml/beat. 7200 1/day The work of the heart in one life is equivalent to lifting 30 tons to the Mount Everest The busy and hard working heart!

➢ Weight of the heart 300g ➢ Work: 75/min, 10000 beats /day ➢ 35 million beats /year, 2.5 billion beats/life ➢ 70ml/beat, 7200 l/day The work of the heart in one life is equivalent to lifting 30 tons to the Mount Everest The busy and hard working heart!

MAIN FUNCTIONS OF THE CIRCULATORY SYSTEM Transport and distribute essential substances to the tissues Remove metabolic byproducts Adjustment of oxygen and nutrient supply in different physiologic states Regulation of body temperature humoral communication

MAIN FUNCTIONS OF THE CIRCULATORY SYSTEM ➢ Transport and distribute essential substances to the tissues. ➢ Remove metabolic byproducts. ➢ Adjustment of oxygen and nutrient supply in different physiologic states. ➢ Regulation of body temperature. ➢ Humoral communication

Systemic and Pulmonary circulation e The McGraw-Hill Companies. inc Permission required for reproduction or display co。O Tissue Pulmonary capillaries Circulation to circulation tissues of head (to lungs Lung cO2 Lung capillaries 2 Systemic circulation (to body) Right side Left side of heart of heart Circulation Tissue capillaries to tissues of lower bod cO O

Systemic and Pulmonary Circulation

A Heart location in the chest F AO

A. Heart location in the chest

B Heart Chambers Path of Blood Through Heart oxygenated blood deoxygenated blood to lungs to body oxygenated blood rom lungs deoxygenated blood from body

B. Heart Chambers

B Heart chambers Path of Blood Through Heart 1 Right Heart deoxygenated blood oxygenated blood to lungs receives venous blood from oxygenated blood systemic circulation from lungs via superior and inferior ygenated od from body vena cava into right atrium >pumps blood to pulmonary circulation from right ventricle >2. Left heart >receives oxygenated blood from pulmonary circulation > pumps blood into systemic circulation

B. Heart Chambers ➢pumps blood to pulmonary circulation from right ventricle ➢2. Left Heart ➢receives oxygenated blood from pulmonary circulation ➢pumps blood into systemic circulation ➢ 1. Right Heart ➢ receives venous blood from systemic circulation ➢ via superior and inferior vena cava into right atrium

Heart valves >1. Atrioventricular tricuspid--between RA and rv three leaflets mitral--between La and LV: two leaflets Aortic 2. Semilunar Mitral valve pulmonic--three leaflets Tricuspid- valve aortic--three leaflets

C. Heart Valves ➢ 1. Atrioventricular ➢ tricuspid--between RA and RV; three leaflets ➢ mitral--between LA and LV; two leaflets ➢ 2. Semilunar ➢ pulmonic--three leaflets ➢ aortic--three leaflets

Pulmonic semilunar valve Aortic semilunar valve Bicuspid valve Tricuspid valve (into left ventricle) (into right ventricle)

心脏正面观 MEDSEE. COM G