Bios 224 Exam 1 CSN - –Answer right side of the heart pumps blood f...

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Bios 224 Exam 1 CSN

• pulmonary circulation (1st)

–Answer right side of the heart pumps blood from the heart to the lungs

• systematic circulation

–Answer left side of the heart pumps blood through the rest of the body

• 1/3rd hearts mass is on side of body?

–Answer Right

• Location of the heart

–Answer mediastinum; midline of thoracic cavity

• Pericardium

–Answer Double-layered membrane surrounding the heart.

• fibrous pericardium

–Answer tough, white fibrous connective tissue that is the outer layer of the pericardium

• serous pericardium

–Answer thin, transparent, inner layer of the pericardium. Simple squamous epithelium

• epicardium

–Answer outer layer of the heart

• Myocardium

–Answer thick, gives heart ability to contract 1 / 2

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• endocardium

–Answer inner lining of the heart; minimizes friction as blood flows thru heart

• Atria (R/L)

–Answer thin, recieve blood from veins

• Ventricles (R/L)

–Answer thick walled muscle pumping blood out

• auricles

–Answer "flaps" on the atria to increase the volume of the chamber

• R and L coronary arteries

–Answer found at base of aorta; supplies heart with nourish- ing blood

• right coronary artery

–Answer 1) R marginal artery; blood to lateral wall of R Ventricle 2) Posterior interventricula artery; blood to posterior/inferior of the heart

• left coronary artery

–Answer 1) L marginal artery; blood to lateral wall and L Ventricle 2) Anterior interventricular artery; blood to anterior 3) Circumflex artery; blood to posterior

• anastomosis

–Answer direct connection between arteries

• aerobic exercise increases
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