Used blood leaves the breasts through the veins and is pumped back to the heart and lungs to be refreshed. Lymph must also be refreshed and recycled. Lymph drains away from your breasts through the lymphatic system, which is made up of lymphatic channels and lymph nodes.
exists and is an alternate of . Chromosomes are located in the nucleus of a cell in eukaryotes. In prokaryotes (which lack a cell nucleus) chromosomes are circular in shape usually found attached to the plasmid membrane. Smaller circular DNA known as plasmids are also found in the prokaryotic cells and are thought of as smaller versions of chromosomes.
Genes are located on chromosomes. Chromosomes are in pairs and genes, or their alleles, are located on each of these pairs. When the cell divides in half, each chromosome ends up in a different cell. This is seen during meiosis in formation of egg cells of sperms. The genes also split into two halves. These are called alleles.