A standard twin mattress is 39 by 75 inches. A king is 76 by 80 inches. This means that a headboard for a king bed is going to be about 76 inches or wider, plenty wide enough to go along the length of a twin bed. Headboards are often slightly wider than the bed for which they are made.
Hemoglobin, Hematocrit, Blood Count. In order to donate blood, a woman must have a hemoglobin level of at least 12.5 g/dL, and a man must have a hemoglobin level of at least 13.0 g/dL. For all donors, the hemoglobin level can be no greater than 20 g/dL.
Type Oâ blood is considered the âuniversal donorâ because it can be donated to people of any blood type. Type AB+ blood is considered the âuniversal recipientâ because people with this type can receive any blood type.ype Oâ blood is considered the âuniversal donorâ because it can be donated to people of any blood type. Type AB+ blood is considered the âuniversal recipientâ because people with this type can receive any blood type.