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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.
Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.
![Two important changes occur in the upper airway in croup:The epiglottis swells, thereby occluding th](https://biology-forums.com/gallery/47/medium_14755_05_10_12_4_11_17_92641447.jpeg)
![The tarsier is a haplorhine, and may represent an evolutionary bridge between lower and higher prima](https://biology-forums.com/gallery/47/medium_275816_26_01_15_5_22_04_203972006.jpeg)