SPLEEN - helps to destroy old red blood cells and lymphocytes, which are cells that produce antibodies to help fight infected and cancerous cells.
KIDNEYS - filter out waste from the blood through structures known as nephrons. The waste removed is combined with water to form urine.
OVIDUCT AND EGGS - oviducts are tubes that carry eggs from the ovaries to the uterus. The eggs are the female reproductive cell.
TESTIS - the male reproductive gland that produce sperm and male hormones such as testosterone.