Inside of Venus. Venus is a rocky planet, much like the Earth. Given its similar size, mass, and density to our planet, scientists think that its interior is much like Earth's own. In addition to a crust significantly older than Earth's constantly changing surface, Venus likely also sports a mantle and a core.
From Wikipedia, the free encyclopedia. The hematocrit (Ht or HCT, British English spelling haematocrit), also known as packed cell volume (PCV) or erythrocyte volume fraction (EVF), is the volume percentage (%) of red blood cells in blood. It is normally 45% for men and 40% for women.rom Wikipedia, the free encyclopedia. The hematocrit (Ht or HCT, British English spelling haematocrit), also known as packed cell volume (PCV) or erythrocyte volume fraction (EVF), is the volume percentage (%) of red blood cells in blood. It is normally 45% for men and 40% for women.
High hematocrit may be due to: 1  Congenital heart disease. 2  Failure of the right side of the heart (cor pulmonale). 3  Dehydration. 4  Abnormal increase in red blood cells (erythrocytosis). 5  Low blood oxygen levels (hypoxia). 6  Scarring or thickening of the lungs (pulmonary fibrosis).