Download Body Systems Review Worksheet

Body Systems Review Worksheet
The main point of lessons 3.3-3.7 is to understand that there are different systems
within the human body and that these systems work both independently and together
to form a functioning human body.
Focus Question: What is the connection between cellular respiration and the 3
body systems (respiratory, circulatory and digestive)?
Lessons 3.3 and 3.4
1a. What body system helps humans breathe? The RESPIRATORY SYSTEM helps
humans breath.
1b. Describe the key organs in this system and how they function as we breathe.
The key organs of the respiratory system are the nose, trachea, lungs and diaphragm.
The lungs are made up of tiny air sacs called alveoli. When the diaphragm contracts,
the lungs expand, inhaling air. When the diaphragm relaxes, the lungs exhale. Oxygen
and carbon dioxide diffuse into and out of tiny blood vessels in the alveoli.
1c. What is the connection between the respiratory system and cellular respiration?
The respiratory system is how oxygen (O2) gets into the body so that it can be carried
to all the individual cells. It is also how the body gets rid of the waste carbon dioxide
(CO2) produced by cellular respiration
Lesson 3.5 and 3.6
2a. What body system includes a transport system and a pump? The CIRCULATORY
SYSTEM is a transport system and a pump.
2b. Describe the key parts of this system and how they function to transport materials
throughout the body.
The key organs of the circulatory system are the heart (a pump) and the blood vessels
(arteries and veins). Veins carry blood towards the heart, and arteries carry blood away
from the heart out to all the cells of the body. The heart is actually TWO pumps; one
side pumps blood to the lungs, the other pumps blood to the rest of the body.
2c. How does oxygen get into the system? How does carbon dioxide get out of
system?
Blood is pumped from the heart to the lungs. In the alveoli, carbon dioxide DIFFUSES
out of the red blood cells and is exhaled. At the same time, oxygen diffuses into the red
blood cells. The blood then travels back to the heart and is pumped out to the rest of
the body.
2c. What is the connection between the circulatory system and cellular respiration?
The circulatory system is how oxygen is carried to each individual cell in the body
through the smallest blood vessels. It is also how each individual cell gets rid of the
carbon dioxide (waste) produced in cellular respiration.
Lesson 3.7
4a. What body system helps us turn the food we eat into energy? The DIGESTIVE
SYSTEM helps turn food into energy.
4b. Describe the key organs in this system and how they function to help get us the
energy we need?
The key organs of the digestive system include: the mouth and teeth; esophagus;
stomach; small intestine; large intestine. Food is broken down and mixed with saliva in
the mouth, passes through the esophagus to the stomach to be broken down even
further before passing into the small intestine. In the small intestine, glucose and
nutrients are absorbed through the villi (small finger-like structures rich in the smallest
blood vessels) and carried to all the cells of the body. Water is reabsorbed in the large
intestine before waste is removed.
4c. How do nutrients get into the cells?
Glucose and nutrients DIFFUSE into the blood stream from the villi. The blood stream
(pumped by the heart) carries glucose and nutrients to all the cells of the body.
4d. What is the connection between the digestive system and cellular respiration?
All cells need glucose to make energy (cellular respiration). The digestive system is the
way glucose (and all the other nutrients) are brought into the body and available to the
individual cells
5. How are all 3 systems connected?
All three systems work together to bring IN-PUTS (reactants) of cellular respiration
(oxygen from the respiratory system, and glucose from the digestive system, are
carried by the circulatory system) all the way to the individual cells. The OUT-PUTS
(products) of cellular respiration (carbon dioxide and water) are carried away, and the
cell uses the ENERGY (ATP) for cell functions.