The genes that code for hemoglobin are found on a- one chromosome b- two chromosomes c- three chromosomes d- four chromosomes !

Where do the respiratory and circulatory systems meet? a. in the heart b. in the muscles c. in the lungs d. in the brain

The dense layer of connective tissue that surrounds an entire skeletal muscle is the

The system breaks down the food we eat, while the system transports the tiny food particles to each cell in the body. a. muscular; circulatory b. digestive; respiratory c. circulatory; digestive d. digestive; circulatory