The Sun is acting weird. It typically puts on a pageant of magnetic activity every 11 years for aurora watchers and sungazers alike, but this time it overslept. When it finally woke up (a year late), it gave the weakest performance in 100 years.
Each bone in your body is made up of three main types of bone material: compact bone, spongy bone, and bone marrow. Compact bone. Compact bone is the heaviest, hardest type of bone. It needs to be very strong as it supports your body and muscles as you walk, run, and move throughout the day.how/hide words to know. 1  Bone marrow: the tissue in the middle of bones that creates red and white blood cells 2  ... Compact bone: the heaviest, hardest type of bone in the body. 3  Lining cell: flat cells that make up and cover the outer layer of bone. 4  Marrow: a soft tissue found inside bones.
Ends: The ends of long bone are actually not compact as the shaft. They are made up of spongy (cancellous) bone. In cancellous bone the bone substance to bone spaces ratio is a smaller quantity.This means that there is little bony tissue and more empty spaces in this portion of the bone.he cortex is actually the compact part of the long bone. The strength of the bone which makes it capable to withstand all the stresses is mainly due to this cortex. In the cortex the ratio of bone substance to bone spaces is a large quantity.