Chapter 23, Problem 1CC

Connecting the Concepts

1. Use the following diagram to review the flow of blood through a human cardiovascular system. Label the indicated parts, highlight the vessels that carry oxygen-rich blood, and then trace the flow of blood by numbering the circles from 1 to 10, starting with 1 in the right ventricle. (When two locations are equivalent in the pathway, such as right and left lung capillaries or capillaries of top and lower portion of the body, assign them the same number.)

Summary Introduction

To label: The diagram of the flow of blood through the circulatory system.

Concept introduction:

The blood flows through the circulatorysystem. It includes various capillaries, aorta, pulmonary artery, pulmonary veins, ventricles, auricles, superior and inferior vena cava.

Answer to Problem 1CC

Fig.1 presents a labelled diagram of blood flow through the circulatory system.

Pictorial representation: A labelled diagram of human circulatory system showing the flow of blood through it is given on Fig.1.

Fig. 1: The circulatory system.

Explanation of Solution

The labeling of the blood vessels in the circulatory system include as follows:

(a)

Network of the blood capillaries: It supplies blood to the various parts of the human body like head, arms, chest and legs.

(b)

Aorta: The blood moves from the heart chambers through this blood vessel.

(c)

Pulmonary artery: It carries the deoxygenated blood.

(d)

Capillaries: They supply blood to the lungs: The blood flows through them and reaches the lungs.

(e)

Pulmonary vein: It carries oxygenated blood.

(f)

Left atrium: It is the upper chamber of the heart which contracts to cause the flow of the blood out of the heart.

(g)

Left ventricle: It is the lower chamber of the heart where the blood flows.

(h)

Aorta: This blood vessel transports the blood to the organs from the heart.

(i)

Capillaries: They supply the blood of abdominal regions and legs:

(j)

Inferior vena cava: It drains the blood into the right atrium.

(k)

Right ventricle: It is the lower chamber of the heart.

(l)

Right atrium: It is the upper chamber of the heart.

(m)

Pulmonary vein: The left atrium of the heart receives blood from the pulmonary vein.

(n)

Capillaries of right lung: It helps in the flow of the blood to the lungs.

(o)

Pulmonary artery: It carries deoxygenated blood.

(p)

Superior vena cava: It circulates the blood in the sino-atrial node in the right atrium.