WorksheetsCirculatory System
Total questions: 38
Worksheet time: 3hrs 10mins
The cardiovascular system helps maintain homeostasis by
sending hunger signals to the brain when energy is low.
slowing down to reduce blood pressure when resting.
increasing breathing to raise blood pH.
filtering out more water for waste excretion.
A heart attack can occur if an artery in the _________ is clogged.
brain
heart
liver
_______, the liquid part of the blood, is mostly made of water.
plasma
platelets
hemoglobin
Hemoglobin picks up and carries both _______.
carbon dioxide and oxygen
carbon dioxide and waste
nutrients and carbon dioxide
_______ help clot blood.
red blood cells
platelets
white blood cells
The ______ fight bacteria and viruses.
red blood cells
platelets
white blood cells
What connects veins and arteries?
platelets
lymph vessels
capillaries
The force of blood on the walls of blood vessels is called ?
atherosclerosis
blood pressure
hypertension
Which of the following is NOT a function of the circulatory system?
transport nutrients and remove waste
fight disease
breakdown food for nutrients
deliver oxygen and remove carbon dioxide
What is the main function of this circuit or loop of circulation?
deliver oxygen to all the cells of the body
pick up oxygen and remove carbon dioxide from the blood
fill the blood with nutrients
Where does unoxygenated blood enter the heart from the body?
1
2
3
Part of the blood that carries oxygen?
plasma
red blood cells
white blood cells
platelets
What is structure #6?
inferior vena cava
superior vena cava
aorta
The blood vessels that carry unoxygenated blood back to the heart from the body are ______.
arteries
veins
capillaries
Which number is the only artery that carries unoxygenated blood away from the heart?
9
5
1
These blood vessels carry oxygenated blood away from the heart and to the body: _______
arteries
veins
capillaries
Unoxygenated blood enters the heart in these two very large veins.
3 and 4
7 and 8
5 and 9
The bottom two chambers (2 and 4) are called?
atria
ventricles
valve
The top two chambers of the heart are called?
atria
ventricles
valve
This chamber of the heart RECEIVES blood returning from the body
right atrium
right ventricle
left atrium
left ventricle
Which chambers of the heart are the thickest and strongest?
atria
ventricles
valves
The aorta is the largest artery in the body. The blood traveling in the aorta is full of?
oxygen
carbon dioxide
white blood cells
Thin-walled vessels that allow for the exchange of O2 , CO2, nutrients and wastes between blood cells or air sacs in the lungs are called
arteries
veins
capillaries
What does deoxygenated, or unoxygenated, mean?
oxygen-rich
blood flow
oxygen-poor
A flap of tissue that prevents blood from flowing backward
septum
apex
valve
Compared to arteries, veins
have thicker walls.
have thinner walls.
are longer.
are shorter.
Which type of blood vessel has the thickest layer of smooth muscle in its walls?
arteries
veins
capillaries
What does the heart do?
it protects organs and produces red blood cells
it breaks down food into nutrients
it pumps the blood
What is the circulatory system also known as?
the pulmonary system
the cardiovascular system
the blood system
Blood vessels that carry blood away from the heart are called _____?
arteries
veins
capillaries
Blood vessels that carry blood back to the heart are called?
arteries
veins
capillaries
The human heart is divided into how many chambers?
2
4
8
1
What does blood do?
carries water to cells
carries oxygen to cells
carries food to cells
all of the above
The circulatory system interacts with the digestive system by
carrying absorbed nutrients all around the body.
carrying oxygen and carbon dioxide around the body.
delivering hormones all around the body.
carrying wastes to the kidneys to be filtered out.
The circulatory system interacts with the excretory system by
carrying absorbed nutrients all around the body.
carrying oxygen and carbon dioxide around the body.
delivering hormones all around the body.
carrying wastes to the kidneys to be filtered out.
The circulatory system interacts with the respiratory system by
carrying absorbed nutrients all around the body.
carrying oxygen and carbon dioxide around the body.
delivering hormones all around the body.
carrying wastes to the kidneys to be filtered out.
