What to Pack for the San Francisco Weather in July. While most people come packed for warm, sunny days, I recommend coming with a few long sleeved items so you have something to keep you warm as the evenings cool down. For the San Francisco weather in July, I typically wear short sleeved shirts and pants during the day. You could probably bring along some shorts too. Since it's breezy here in July, you will find it a bit too cool most of the time for shorts.
Bone marrow is the soft, flexible connective tissue within bone cavities. A component of the lymphatic system, bone marrow functions primarily to produce blood cells and to store fat. Red marrow contains hematopoietic stem cells that produce two other types of stem cells: myeloid stem cells and lymphoid stem cells. 2  These cells develop into red blood cells, white blood cells, or platelets.
Red bone marrow is the active portion that produces red blood cells, while yellow bone marrow contains fat cells. In adults the red bone marrow is located in the flat bones, such as the upper hip bones, known as the pelvic girdle, and the sternum.n the center of most large bones there is a soft tissue (called bone marrow) that makes most of the body's blood cells. The marrow is a network of tissue that contains immature blood cells in an organized structure.