Body Systems
Which body system includes your brain, spinal cord, and nerves?
Nervous system
What is the word for keeping your body clean to protect your health?
Personal hygiene
What is the largest organ in the human body?
Skin
What is the hard outer layer of a tooth called?
Enamel
How many times a day should you brush your teeth?
Twice
Which two body systems work together to help you move?
Skeletal and muscular systems
What causes body odor when it mixes with sweat?
Bacteria
What is the outermost layer of your skin called?
Epidermis
How many baby teeth do most children have?
20
What SPF should your sunscreen have to protect your skin?
SPF 30 or higher
What type of blood vessel carries blood away from the heart?
Arteries
Name two situations when you should wash your hands.
Any two: before eating, after using the bathroom, after touching pets, after handling garbage, or after being around someone sick
What substance gives your skin its color?
Melanin
What is the layer of a tooth underneath the enamel called?
Dentin
Why should you avoid picking or popping pimples?
It can cause infections or scars
What are the three types of muscle found in the human body?
Skeletal, smooth, and cardiac muscles
Explain how good hygiene can improve both physical and social health.
It removes dirt and germs, helps prevent illness, and can improve confidence around others
Why does acne become more common during puberty?
Hormones cause the skin to produce more oil, which can clog pores
What is found inside the pulp of a tooth?
Nerves and blood vessels
Why is flossing important even if you brush your teeth every day?
It removes trapped food and plaque from between teeth where a toothbrush may not reach
Explain how the respiratory and circulatory systems work together to keep your body alive.
The respiratory system brings oxygen into the lungs, and the circulatory system carries oxygen through the blood to the body's cells
A student showers every day but still notices body odor. Explain what causes body odor and identify one way to reduce it.
Bacteria mix with sweat on the skin; bathing regularly and using deodorant can help
Name all three layers of skin and explain one job of each.
Epidermis: protects from germs;
dermis: contains nerves and glands;
subcutaneous layer: provides warmth and cushioning
A cavity has passed through the enamel and dentin and reached the pulp. Why is this more serious than a cavity only in the enamel?
The decay has reached the nerves and blood vessels, which can cause pain and more serious damage
A student spends the afternoon outside, forgets sunscreen, and later develops a sunburn. Explain what caused the damage and identify two ways to prevent it next time.
UV rays from the sun damaged the skin; use sunscreen, seek shade, or wear protective clothing