Date: ___________________________
Name: _______________________________
SBI3U Worksheet – Heart, Blood Vessels and Blood
Heart and Blood Vessels
1. Fill in the following chart:
Arteries
How they
carry blood
Small vessels
are called
Blood
Pressure
Wall
structure
Special
Feature
Example
Veins
Capillaries
2. Fill in the blanks
a. ______________________ is the largest vein in the body that takes blood from all of the
body and dumps it into the ___________ atrium of the heart.
b. __________________ carry blood away from the aorta to the arterioles.
c. __________________ carry blood back toward the heart; rely on muscle contractions to
provide pressure to move the blood.
d. __________________ are no thicker than human hair and carry blood away from arteries
into the capillaries.
e. ___________________ carry blood back to the veins after exchanges have occurred in the
capillaries.
f. ___________________ is the largest artery in the body.
g. ___________________ are tiny connecting bridges between arterioles and venules.
There are tiny muscles that control the flow of blood into these vessels called
___________________.
h. When blood returns to the heart, it first passes through the _____________ side of the
heart, then the _______________ side of the heart.
Date: ___________________________
Name: _______________________________
i. Capillaries are composed of a single layer of cells that are responsible for exchanging
_________________ and __________________.
j. The _____________ _________ sends oxygenated blood back to the heart from the lungs.
3. Label the heart diagram below and indicate with arrows the direction of blood flow.
4. Name each part of the heart to answer the following questions.
a. Which structure separates the right side of the heart from the left side? Why is it
necessary to separate the two sides?
b. Which structure stops the backflow of blood into the left ventricle?
c. Identify the tricuspid valve. If this valve did not close properly, what effect if any would
this have on the body?
d. Which chamber pumps oxygenated blood out of the heart?
Date: ___________________________
Name: _______________________________
e. Trace the flow of a red blood cell as it travels through structures D to O in the heart
diagram above.
5. Modified True or False
Please correct any false statements to make them true.
a. ______
Generally arteries have thicker walls than veins
b. ______
Semilunar valves are located between the atriums and the ventricles
c. ______
Veins are vessels that conduct blood from the heart, towards the body
d. ______
Heart rate increases as a result of the stimulation of the sympathetic nervous
system.
Blood
1) What are the 3 main functions blood does for our body?
1.
2.
3.
2) What are the 4 components of blood?
__________________________
__________________________
__________________________
__________________________
3) Fill in the blank with the appropriate component
Look like red discs, no nucleus, similar in size
__________________________
Small granular fragments, no nucleus, vary in size
__________________________
Large in size, well formed nucleus
__________________________
Straw-colored fluid
__________________________
4) Where are red blood cells (RBC’s) made?
__________________________
Date: ___________________________
Name: _______________________________
5) Hemoglobin gives RBC’s the ability to
__________________________
6) What organ removes dead RBC’s?
__________________________
7) What is the RBC’s job in transportation?
__________________________
8) There is __________ white blood cell to every ____________ RBC.
9) What does a white blood cell do? _____________________________________________
10) True or False? White blood cells only travel in the blood stream and never travel in to the
body __________________________
12) Name the white blood cells discussed in class and describe their function.
________________________:__________________________________________________
______________________________________________
________________________:__________________________________________________
______________________________________________
13) Platelets are removed in the _______________________ and ______________________.
14) What do platelets do and how do they do it? ______________________________________
15) Plasma is composed of _________ % __________________________ and _________ %
_________________________________________________________________________
16) True or False? Missing certain proteins does not affect the bloods clotting ability
__________________________
17) True or False? All 4 parts of the blood work together at the same time
__________________________