Blood is taken to the lungs to become oxygenated and returned to the heart before being pumped through the body. Which blood vessels carry blood away from the heart? (1 point)

The blood vessels that carry blood away from the heart are **arteries**.

Blood is taken to the lungs to become oxygenated and returned to the heart before being pumped through the body. Which blood vessels carry blood away from the heart? (1 point)

elastic
veins
arteries
capillaries

The blood vessels that carry blood away from the heart are **arteries**.

Oxygen is taken into the body from the environment, and carbon dioxide is removed from the body and released into the environment. Which body system is responsible for exchanging gases with the environment? (1 point)

circulatory system
nervous system
respiratory system
endocrine system

The body system responsible for exchanging gases with the environment is the **respiratory system**.

Oxygen is taken into the body from the environment, and carbon dioxide is removed from the body and released into the environment. Which body system is responsible for exchanging gases with the environment? (1 point)

circulatory system
nervous system
respiratory system
endocrine system

The body system responsible for exchanging gases with the environment is the **respiratory system**.

A football player gets tackled during the game, which of the following body systems is responsible for protecting their organs?

skeletal system
reproductive system
circulatory system
nervous system

The body system responsible for protecting the organs is the **skeletal system**.

A football player gets tackled during the game, which of the following body systems is responsible for protecting their organs?

skeletal system
reproductive system
circulatory system
nervous system

The body system responsible for protecting the organs is the **skeletal system**.

Make the connection: your heart is dependent on oxygen from your respiratory system, and it is delivered by the

nervous system.
circulatory system.
muscular system.
respiratory system.

Your heart is dependent on oxygen from your respiratory system, and it is delivered by the **circulatory system**.

Make the connection: your heart is dependent on oxygen from your respiratory system, and it is delivered by the

nervous system.
circulatory system.
muscular system.
respiratory system.

Your heart is dependent on oxygen from your respiratory system, and it is delivered by the **circulatory system**.

Which part of the circulatory system is especially vulnerable to blockages?

heart
capillaries
veins
arteries

The part of the circulatory system that is especially vulnerable to blockages is the **arteries**.

Which part of the circulatory system is especially vulnerable to blockages?

heart
capillaries
veins
arteries

The part of the circulatory system that is especially vulnerable to blockages is the **arteries**.

What is an author's tone? (1 point)

the way they build suspense
their purpose for writing
their attitude toward a subject
the way they write dialogue

An author's tone is **their attitude toward a subject**.