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The human body produces and destroys 15 million blood cells every second.

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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

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Asthma cases in Americans are about 75% higher today than they were in 1980.

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Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

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Always store hazardous household chemicals in their original containers out of reach of children. These include bleach, paint, strippers and products containing turpentine, garden chemicals, oven cleaners, fondue fuels, nail polish, and nail polish remover.

The integument: the epidermis, dermis, subcutaneous tissue, and its appendages. The integument: the epidermis, dermis, subcutaneous tissue, and its appendages.
Integumentary system.Epidermis and dermis. Integumentary system.Epidermis and dermis.
Epidermis and dermis. Epidermis and dermis.
The structure of skin (a) and epidermis (b) at the microscopic level. The structure of skin (a) and epidermis (b) at the microscopic level.
The integument: the epidermis, dermis, subcutaneous tissue, and its appendages. The integument: the epidermis, dermis, subcutaneous tissue, and its appendages.
Days 18–23 Bumps of mesoderm (somites) form. They will develop into the dermis and most of the ... Days 18–23 Bumps of mesoderm (somites) form. They will develop into the dermis and most of the ...
Video: Predator- prey competition and symbiosis

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