Elementary students
Learning Center
Digestion: How long does it take?
Digestion takes about two to five days, depending on your system.
Swallowing gum: Is it harmful?
Your body can't digest chewing gum. So what happens when you swallow it?
Scalp psoriasis vs. seborrheic dermatitis: What's the difference?
Learn how to tell apart these common conditions of the scalp, both of which cause inflamed, scaly skin.
Bacterial vs. viral infections: How do they differ?
Understand the differences between bacterial and viral infections.
Cervical cysts: Can they be cancerous?
Cervical cysts usually aren't cancerous. Some types of cervical cysts are so common that they're considered a normal feature of cervical anatomy.
Baby teeth: When do children start losing them?
Losing baby teeth is a big childhood event. Find out what to expect.
Concussion in children: What are the symptoms?
Whether your child's concussion is mild or severe, allow time to recover.
Premenstrual dysphoric disorder: Different from PMS?
Extreme moodiness, intense sadness or marked irritability in the days before your period — along with your usual PMS symptoms — could be PMDD.
Bladder infection in men
Although women are more likely to get bladder infections, men can get them, too. Learn about signs and symptoms and what could put you at risk.
Ovulation signs: When is conception most likely?
Trying to get pregnant? Learn about symptoms of ovulation
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