Bones and Muscles

The human body contains around this many cells.

• 100 billion cells

• 100 quadrillion cells

• 100 trillion cells

• 100 quintillion cells

This type of body tissue connects and supports parts of your body.

• Muscle tissue

• Nervous tissue

• Connective tissue

• Epithelial tissue

This body tissue enables you to see, hear, and think.

• Muscle tissue

• Nervous tissue

• Connective tissue

• Epithelial tissue

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The nervous system works with the ________________ system to give you information about your environment.

• Integumentary

• Skeletal

• Muscular

• Endocrine

A specialized cell in the kidney is called this.

• neuron

• nephron

• fiber bundle

• alveola

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The ability to destroy pathogens before the cause diseases.

• immune response

• immunity

• preemptive strike

• marked

The process by which an organism's internal environment is kept stable in spite of changes in the external environment.

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A human newborn has about 275 bones. A human adult has 206 bones. What causes human adults to have less bones than a newborn?

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OFF

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What are the types of bone marrow?

• Red

• Yellow

• Brown

• White

A condition in which the body's bones become weak and break easily.

• scoliosis

• osteoporosis

• osteonecrosis

• osteoarthritis