Download Name: Period: _____ Teacher: Science Homework Due: Friday

Science Homework
Due: Friday, October 30th
Name:_____________________________________________________
Period: _____
Teacher:__________________________
Part I: Levels of Biological Organization
Directions: Read the passage below and answer the questions.
Our 7th grade science journey began with an exploration of the
atom, the smallest unit of all matter. Slowly, we are moving up
the levels of biological organization, passing molecules and
compounds, organelles, and cells. For the next 2 months, we
will investigate 4 additional levels of biological organization:
tissue, organ, organ system, and organism.
By now, you should be able to describe the basic structures
and functions of a cell, but what happens when cells function
or work together? A collection of cells all performing similar
functions form a structure known as tissue. Tissues are used
to construct larger structures within the body known as
organs. For example, your brain is an organ that receives,
analyzes, and sends information, and it is constructed of brain
tissue. Brain tissue is a collection of cells, which because of their specialized structure are able to store
and transmit information; a muscle cell could not perform the same function as a brain cell because their
structures are different. Your brain, however, does not function by itself to send and receive data. Your
brain functions with your spinal chord and nerves, and together they form the nervous system.
Although we divide our body into different systems, you will understand that each organ system depends
on the other systems to function properly. If one system fails, then the others will fail as well.
Questions:
1) Which list correctly orders the levels of biological organization from smallest to largest?
a. atomsmoleculescellsorganellesorgantissueorgan systemorganism
b. atomsmoleculesorganellescellsorgantissueorgan systemorganism
c. organismorgan systemorgantissuecellsorganellesmoleculesatoms
d. atomsmoleculesorganellescellstissueorganorgan systemorganism
2) Which word is not a correct synonym for “structure”?
a. Part
b. Job
c. Organization
d. Design
3) Which word is not a correct synonym for “function”?
a. Duty
b. Purpose
c. Makeup
d. job
4) Which structure is part of the nervous system?
a. Spinal chord
b. stomach
d. skin
c. heart
5) What is the function of the nervous system; answer with a complete sentence.
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Part II: Introduction to Body Systems
Directions: Use the table below to answer the questions with correct spelling!
Body System
Functions (Jobs)
Structures (Organs)
Nervous System
…to collect, analyze, store, and send information,
and respond to stimuli (signals) in the environment.
…to make and release special organic compounds
(hormones) that control or maintain other body
systems.
…to perform gas exchange by taking in (inhaling)
oxygen gas (O2) and releasing (exhaling) carbon
dioxide (CO2)
…to transport blood, nutrients, and cellular waste to
and from different cells.
…to break down food and absorb water and
nutrients.
…to remove waste from the body.
Brain, Nerves, Spinal chord
…to provide support and protection for other body
systems.
…to protect internal body systems, synthesize
vitamin D, and regulate temperature and water loss.
…to provide movement.
Bones, Ligaments, Tendons, and
Cartilage
Skin, Sweat glands
…to produce offspring.
Male: Testes, Prostate, Penis
Females: Ovaries, Uterus, Vagina
(Nur-vis)
Endocrine System
(En-do-crine)
Respiratory System
(Res-per-a-tor-ee)
Circulatory System
(sirk-you-la-tor-ee)
Digestive System
(Die-jest-ive)
Excretory System
(Ex-cre-tor-ee)
Skeletal System
(skel-a-tall)
Integumentary System
(In-teg-you-ment-a-ree)
Muscular System
Adrenal glands, Pituitary gland,
Testes (males), ovaries (females),
Hypothalamus, Pancreas
Trachea (wind pipe), Lungs, Bronchi
tubes, Alveoli, Larynx (voice box).
Heart, Arteries, Veins, Capillaries
Mouth, Esophagus, Stomach, Small
and large intestine, Liver, Gall bladder
Kidneys, Bladder
Muscles, tendons
(Musk-you-lar)
Reproductive
(Re-pro-duct-ive)
1) Which body system is most like the cell membrane?
________________________________________________
2) Which body system includes the heart, arteries, veins, and capillaries?
________________________________________________
3) Which system is needed to remove break down food and absorb nutrients and water?
________________________________________________
4) Which body system includes the lungs?
________________________________________________
5) Which body system would make and release the hormone insulin?
________________________________________________
6) What is the function of the muscular system? Answer with a complete sentence.
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7) People with asthmas find it difficult to breath sometimes because their bronchus tubes swell or
enlarge. Asthma is a disease that affects the _________________________________________________ system.