Page 180 - 86 human physiology part-2

Development: Birth Through Death

Intramembranous ossification
The type of bone formation responsible for the development of flat bones, especially those found
in the skull. In intramembranous ossification mesenchymal cells develope into bone without first
going through a cartilage stage.

lacunae
spaces between bone lamellae.

lamellae
cocentric layers of bone matrix.

Menopause
The permanent cessation of menstrual cycles.

Menarche
The first menstrual bleeding, usually occurs at about 12.7 years of age.

Mongolian spots
are common among darker-skinned races, such as Asian, East Indian, and African. They are flat,
pigmented lesions with unclear borders and irregular shape. They appear commonly at the base of
the spine, on the buttocks and back. They may also can appear as high as the shoulders and
elsewhere. Mongolian spots are benign skin markings and are not associated with any conditions
or illnesses.

Necrosis
A form of cell death that results from acute cellular injury.

Osteoporosis
A condition that is characterized by a decrease in bone mass and density, causing bones to
become fragile.

Puberty
The process of physical changes by which a child's body becomes an adult body capable of
reproduction

Pyloric Stenosis
Narrowing of the pyloric sphincter that reduces or eliminates the passage of food from the
stomach to the small intestine, often causing projectile vomiting in infants.

Trabeculae
spongy bones that make plates or bars instead of cocentric layers.

References

• http://www.methuselahmouse.org
• Van De Graaff (2002) Human Anatomy 6th ed. McGraw-Hill Higher Education
• Windmaier, P.W. Raff, H. Strang, T.S. (2004) Vander, Sherman, & Luciano's Human
Physiology, the Mechanisms of Body Function 9th ed. Mcgraw-Hill

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