Which systems are involved with the breakdown and delivery of nutrients from recently eaten food to the cells and the removal of waste materials from the body? A. excretory, skeletal, and digestive
B. digestive, nervous, and endocrine
C. excretory, circulatory, and nervous
D. digestive, circulatory, and excretory

D. digestive, circulatory, and excretory

Explanation:

The breakdown of food happens at the "digestive system." This starts with the chewing of food (mastication) until the food is broken down into small bits of pieces. The food then goes to the tracheal tube where it continuously moves through the action of peristalsis. It is then absorbed by the body. Some of these goes into the "circulatory system" through the small intestine. Those which were not absorbed are excreted or removed from the body through the large intestine. This is the role of the "excretory system."

So this means that there are only three systems involved: digestive system, circulatory system and excretory system.

answerassignment page;

when in a crucial situation, after calling 911, the correct posture for delivering effective compression is the proper hand placement.

first, place two fingers at the sternum, then put the heel of your other hand next to the fingers and place hand on top of the other. lock your elbows by using your body’s weight and compress the victim’s chest with a depth of 2 inches.

moreover, do 15 compression and 2 breaths, this process must be done four times until there is a pulse or a arrive.