A pea-sized gland sits in a bony pocket beneath the brain and releases chemical messengers into the bloodstream. Which organ system does it belong to?

A thick band of contractile tissue in the upper arm shortens to bend the elbow. Which organ system includes it?

A flat organ made of cell layers and connective tissue covers the body's outside surface. Which organ system does it belong to?

Hard structures inside the limbs store minerals, protect marrow, and form levers for movement. Which system includes them?

A soft tube with cartilage rings carries air from the throat toward two branching tubes in the chest. Which organ system does it belong to?

A muscular sac below the ribs churns food with acid and enzymes before passing it onward. Which organ system includes it?

A pair of bean-shaped organs in the posterior abdomen filter plasma and send the liquid product through tubes to a storage sac. Which system is this?

A hollow four-chambered organ in the mediastinum contracts rhythmically to move plasma and cells through closed tubes. Which system includes it?

A network of vessels and small filters returns excess tissue fluid to circulation and houses many white blood cells. Which organ system is this?

A tube with fimbriae carries an oocyte from an ovary toward a muscular organ where pregnancy can occur. Which system includes it?

A cord of excitable tissue in the vertebral canal carries rapid electrical signals between the head and the trunk. Which organ system includes it?

Which organ system forms the body's waterproof outer barrier and helps regulate temperature through sweat production?

The body needs a framework whose red marrow makes new blood cells and whose bones shield the brain, heart, and lungs. Which organ system does that job?

Which organ system contracts to move body parts, maintain posture, and produce much of the body's heat?

Rapid detection of a hot surface and signaling to pull the hand away are mainly jobs of which organ system?

Long-term control of growth, metabolism, and reproduction by chemical messengers released into blood is the job of which system?

A body-wide transport system delivers oxygen, nutrients, and hormones while carrying wastes away from tissues. Which system is responsible?

Which system absorbs dietary fats through lacteals in the small intestine and carries them toward the bloodstream?

Taking in oxygen, removing carbon dioxide, and helping regulate blood pH by ventilation are functions of which organ system?

Which organ system breaks food into absorbable molecules and moves the remaining material toward elimination as feces?

Removing nitrogenous wastes from plasma and adjusting water, salt, and acid-base balance are functions of which organ system?

Producing gametes and supporting fertilization and development before birth belong to which organ system?

The esophagus and pancreas are in one organ system. Among the appendix, thyroid gland, urinary bladder, and trachea, which organ is in that same system?

The femur and sternum are in one organ system. Among the scapula, trachea, ovary, and spleen, which organ is in that same system?

The trachea and alveoli are in one organ system. Among the larynx, esophagus, ureter, and thymus, which organ is in that same system?

The thymus and lymph nodes are in one organ system. Among the spleen, pancreas, kidney, and uterus, which organ is in that same system?

A patient's spleen is removed after severe injury. Which job does the body now do less well?

A patient's gallbladder is removed. Which job is lost from that organ?

A patient's thyroid gland is removed. Which job is lost from that gland?

A patient's uterus is removed. Which job can that organ no longer perform?