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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.
When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
![Behavior modification has been useful in raising the amount of social responding by children with ...](https://biology-forums.com/gallery/47/medium_667187_21_02_17_4_33_12_255931547.png)
![Children will feel more at ease and have a better learning experience if they are allowed to touch ...](https://biology-forums.com/gallery/47/medium_665046_07_03_17_5_19_36_26492919.jpeg)