What is the Eastern Time Zone? The Eastern Timezone is an area 5 hours behind Greenwich Mean Time ( GMT-5 ) during the winter months (referred to as EST) and 4 hours behind Greenwich Mean Time ( GMT-4 ) during the summer months (referred to as EDT). From 2 A.M. on the second Sunday in March to 2 A.M. on the first Sunday in November, Daylight Saving Time is in effect.
WHAT ARE SINUSES? Sinuses are air pockets that are located within the bones of the skull and face and are connected to your nasal passages by small tubes or channels, the osteomeatal complex. These channels permit air to flow from the nose into the sinuses and allow drainage of mucous from each sinus into the nose.
Bones of the Skull. 1. Frontal - anterior portion above eyes 2. Parietal - one on each side of the skull, just behind frontal bone 3. Occipital - forms the back of the skull and base of the cranium 4. Temporal - forms parts of the sides and base of cranium 5. Sphenoid - wedged between several other bones in anterior portion of the cranium 6. Maxilla - forms upper jaws 7. Mandible - lower jaws, only moveable bone of the skull . Sutures - connection points between skull bones. 1.