Volume 1 Unit 4 Part 3

The ______ system provides a strong framework.

The _________ system provides the tubing for fuel and oxygen to travel the thousands of miles to keep muscles working.

The ______ system keeps us aware of our surroundings

The ________ system supplies the blood with oxygen.

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Which system rids the body of processed wastes?

Urinary Signup and view all the answers

The ________ contains all the interlocking systems

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________ are the engines of the body.

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What is the most incredible part of the human body? Why?

The brain. It allows us to think. Signup and view all the answers

What are the most common chemical elements in the body?

Carbon, hydrogen, oxygen, and nitrogen. Signup and view all the answers

What is the most common molecule in the human body?

Water Signup and view all the answers

How much of the human body is made up of water?

65 percent. Signup and view all the answers

Some serve as building blocks for cells; others speed up the chemical reactions within the body.

Proteins Signup and view all the answers

Which macromolecules carry instructions that tell each cell how to perform its particular jobs

Nucleic acids Signup and view all the answers

Which macromolecules provide energy that powers all the body’s activities

Carbohydrates Signup and view all the answers

Some store extra fuel; others serve as building materials for the cells that make up the body.

Lipids Signup and view all the answers

What is the basic unit of all living things?

The cell Signup and view all the answers

What are the four main kinds of tissues in the body?

Epithelial, connective, muscle, and nervous Signup and view all the answers

What is the largest organ of the body?

The skin, or integumentary system Signup and view all the answers

Name the three layers of skin.

Epidermis, dermis, and subcutaneous tissues. Signup and view all the answers

The innermost layer of the skin is called the __________.

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Which layer of skin protects the body’s inner tissues from the harsh rays of the sun?

The epidermis Signup and view all the answers

Middle layer of the skin

Dermis Signup and view all the answers

The ___________________ is the layer of skin that cushions the inner tissues against blows to the body.

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The ________ forms the outermost layer of the skin.

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Nerve endings in the ___________ respond to cold, heat, pain, pressure, and touch.

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The __________________ provides extra fuel for the body

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The __________ serves as a barrier between the outside world and the inner tissues of the body

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The _________ helps keep the temperature of the body within its normal range

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The ___________ consists of tough, dead cells

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The ___________ prevents the loss of water from the tissues.

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The _________ serves as an important sense organ.

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Give some examples of how the skeletal system protects internal organs.

The brain is shielded by the skull, the spinal cord by the spinal column, and the heart and lungs by the ribs. Signup and view all the answers

The place where bones meet is called a _______.

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What are the two basic kinds of joints?

Movable and fixed joints Signup and view all the answers

What holds movable joints together?

Ligaments Signup and view all the answers

How does bone tissue play a role in keeping the blood healthy?

Bone marrow produces new blood cells and releases them into the bloodstream. Signup and view all the answers

What are the main tasks of the muscles?

Move limbs, push food through the gut, make the heart beat, and control blood flow around the body Signup and view all the answers

What are the three main types of muscles?

Skeletal, smooth, and cardiac Signup and view all the answers

Why are skeletal muscles sometimes called “voluntary muscles”?

Because humans cause them to move at will Signup and view all the answers

How do muscles move the body?

By pulling. Signup and view all the answers

How do smooth muscles differ in appearance from skeletal muscles?

They do not have striations like skeletal muscles. Signup and view all the answers

Why are smooth muscles sometimes called “involuntary muscles”?

They contract and relax automatically; they are not consciously controlled Signup and view all the answers

Name the muscle that has characteristics of both the skeletal and smooth muscles.

Cardiac muscle. Signup and view all the answers

What is the main part of the digestive system?

Alimentary canal, or gut Signup and view all the answers

What kind of process is digestion?

One of the chemical reactions sped up by enzymes Signup and view all the answers

What reactions happen during digestion?

Starches and complex sugars break down into simple sugars, fats become fatty acids and glycerol, and proteins break down into amino acids. Signup and view all the answers

Where does digestion begin?

In the mouth Signup and view all the answers

Volume 1 Unit 4 Part 3

Questions and Answers

The ______ system provides a strong framework.

The _________ system provides the tubing for fuel and oxygen to travel the thousands of miles to keep muscles working.

The ______ system keeps us aware of our surroundings

The ________ system supplies the blood with oxygen.

Which system rids the body of processed wastes?

The ________ contains all the interlocking systems

________ are the engines of the body.

What is the most incredible part of the human body? Why?

What are the most common chemical elements in the body?

What is the most common molecule in the human body?

How much of the human body is made up of water?

Some serve as building blocks for cells; others speed up the chemical reactions within the body.

Which macromolecules carry instructions that tell each cell how to perform its particular jobs

Which macromolecules provide energy that powers all the body’s activities

Some store extra fuel; others serve as building materials for the cells that make up the body.

What is the basic unit of all living things?

What are the four main kinds of tissues in the body?

What is the largest organ of the body?

Name the three layers of skin.

The innermost layer of the skin is called the __________.

Which layer of skin protects the body’s inner tissues from the harsh rays of the sun?

Middle layer of the skin

The ___________________ is the layer of skin that cushions the inner tissues against blows to the body.

The ________ forms the outermost layer of the skin.

Nerve endings in the ___________ respond to cold, heat, pain, pressure, and touch.

The __________________ provides extra fuel for the body

The __________ serves as a barrier between the outside world and the inner tissues of the body

The _________ helps keep the temperature of the body within its normal range

The ___________ consists of tough, dead cells

The ___________ prevents the loss of water from the tissues.

The _________ serves as an important sense organ.

Give some examples of how the skeletal system protects internal organs.

The place where bones meet is called a _______.

What are the two basic kinds of joints?

What holds movable joints together?

How does bone tissue play a role in keeping the blood healthy?

What are the main tasks of the muscles?

What are the three main types of muscles?

Why are skeletal muscles sometimes called “voluntary muscles”?

How do muscles move the body?

How do smooth muscles differ in appearance from skeletal muscles?

Why are smooth muscles sometimes called “involuntary muscles”?

Name the muscle that has characteristics of both the skeletal and smooth muscles.

What is the main part of the digestive system?

What kind of process is digestion?

What reactions happen during digestion?

Where does digestion begin?

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