Read the descriptions below, which one best describes the cardiovascular system?
Group of answer choices

Air moves down the trachea, a long straight tube in the chest. The diaphragm pulls air in and pushes it out. Behind the nasal cavity, air next passes through the pharynx, a long tube that is shared with the digestive system. Both food and air pass through the pharynx. A flap of connective tissue called the epiglottis closes over the trachea when food is swallowed to prevent choking or inhaling food. In humans, the pharynx is important in vocalization.

consists of many specialized mini systems that each controls a different type of motion. Thanks to all of these different systems, the body can initiate motion and function properly.

This network supplies tissues in the body with oxygen and other nutrients, transports hormones, and removes unnecessary waste products.

acts as a scaffold by providing support and protection for the soft tissues that make up the rest of the body.