Download The Human Heart The human heart has four chambers: right atrium

Bio07_TR__U10_CH37.QXD
5/9/06
1:40 PM
Page 99
Name______________________________
Class __________________
Date ______________
The Human Heart
The human heart has four chambers: right atrium, right ventricle,
left atrium, and left ventricle. Blood flows from the body into the
right atrium. Valves keep blood flowing in only one direction.
Follow the prompts to identify parts of the human heart. The diagram
shows the heart as if viewed from the front, so left and right are switched.
• Color the left atrium orange.
• Color the left ventricle red.
• Color the right atrium yellow.
• Color the right ventricle blue.
to body
from upper
body
from lungs
Use the diagram to answer the question.
1. A valve is located between the right atrium and the right
ventricle. What is the role of valves in the heart?
© Pearson Education, Inc., publishing as Pearson Prentice Hall.
99
Bio07_TR__U10_CH37.QXD
5/9/06
1:40 PM
Page 100
Name______________________________
Class __________________
Date ______________
The Circulatory System
The human circulatory system moves blood through two primary
pathways. One connects the heart and lungs, and the other connects the heart and the rest of the body.
Draw arrows to show how blood moves through the circulatory system.
One has been drawn for you.
Capillaries of
head and arms
Superior
vena cava
Capillaries of
right lung
Aorta
Pulmonary
artery
Pulmonary
vein
Capillaries of
left lung
Inferior
vena cava
Capillaries of
abdominal organs
and legs
Use the diagram to answer the question.
1. Through which blood vessel does blood return to the heart
from the head and arms?
© Pearson Education, Inc., publishing as Pearson Prentice Hall.
100
Bio07_TR__U10_CH37.QXD
5/9/06
1:40 PM
Page 101
Name______________________________
Class __________________
Date ______________
Blood Vessels
As blood flows through the body, it passes through three types of
blood vessels—arteries, veins, and capillaries.
Complete the table. Fill in the missing information.
Blood Vessels
Structure
Function
arteries
thick walls containing
connective tissue,
endothelium, and
smooth muscle
walls containing
connective tissue,
endothelium, and
smooth muscle;
large ones also have
valves to control the
direction of blood flow
capillaries
carry blood toward
the heart
bring nutrients and
oxygen to cells
and remove
carbon dioxide
and waste
Use the table to answer the questions.
1. Which are the smallest blood vessels? Circle the correct answer.
capillaries
veins
2. How does exercise help veins function?
© Pearson Education, Inc., publishing as Pearson Prentice Hall.
101