Hollow lightweight bones benefit the bird by letting it fly. If the bird had regular bones like any other animal, then the bird wouldn't have the ability to be able to fly due to the extra weight.
<span>red blood cells are circular cells that transport oxygen throughout the body. white blood cells are part of the immune system and fight infection and foriegn objects that enter the body. plasma is the liquid part of blood, and platelets are the part of the blood that cause clotting.</span>
Explanation:
the process in a woman of discharging (through the vagina) blood and other materials from the lining of the uterus at about one monthly interval from puberty until menopause (ceasing of regular menstrual cycles).
Answer: b pelvic
Explanation:The pelvic is lower down the skeleton
