Which of the following is listed from least to most complex:
organ, organism, cells
cells, tissues, organism, organ system
cells, organ, organism
tissues, organism, organ
Where are nutrients absorbed in the digestive tract?
large intestine
small intestine
mouth
stomach
What is the main job of the circulatory system?
transporting oxygen to the cells
fighting infection in cells
removing waste products from the blood
transporting carbon dioxide to the cells
What do hormones do?
