Procedure A The Human Heart

1. Review a textbook section on the structure of the heart.

2. As a review activity, label figures 41.1, 41.2, and 41.3.

3. Complete Part A of Laboratory Report 41.

4. Examine the human heart model and locate the following features:

heart base apex pericardial sac fibrous pericardium (outer layer) parietal pericardium (inner lining) pericardial cavity epicardium (visceral pericardium) myocardium endocardium atria right atrium left atrium auricles ventricles right ventricle left ventricle atrioventricular orifices atrioventricular valves (A-V valves) tricuspid valve bicuspid (mitral) valve chordae tendineae papillary muscles atrioventricular sulcus

Figure 41.1 Label this anterior view of the human heart.

Brachiocephalic veins

Right pulmonary artery

Branches of right pulmonary veins

(chamber)

(chamber)

Marginal artery

Brachiocephalic veins

Right pulmonary artery

Branches of right pulmonary veins

Marginal artery

Heart Labeled Brachocephalic

Brachiocephalic artery

Left common carotid artery Left subclavian artery

Left pulmonary artery

Left pulmonary veins

Circumflex artery

(chamber) Anterior interventricular artery

Adipose tissue Apex of the heart

Brachiocephalic artery

Left common carotid artery Left subclavian artery

Left pulmonary artery

Left pulmonary veins

(chamber)

Circumflex artery

(chamber) Anterior interventricular artery

Adipose tissue Apex of the heart interventricular sulci anterior sulcus posterior sulcus superior vena cava inferior vena cava pulmonary trunk pulmonary arteries pulmonary veins aorta semilunar valves pulmonary valve aortic valve left coronary artery circumflex artery anterior interventricular artery right coronary artery posterior interventricular artery marginal artery cardiac (coronary) veins great cardiac vein middle cardiac vein small cardiac vein coronary sinus

OPTIONAL ACTIVITY

u se red and blue colored pencils to color the blood vessels in figure 41.3. Use red to illustrate a blood vessel high in oxygen, and use blue to illustrate a blood vessel low in oxygen. You can check your work by referring to a corresponding figure in the textbook.

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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