In the past, an irregular heart rhythm was treated by using a drug to help regulate the beat. There is a treatment that can also
regulate heart rhythms that has replaced drugs in some cases. What is that treatment?

Texas bluebonnet plants seen in this photo are an example of which ecological unit?

An organ system consists of a group of organs that performs specific functions necessary for the survival of an organism. humans have eleven different organ systems: integumentary, skeletal, muscular, nervous, endocrine, circulatory, lymphatic, respiratory, digestive, urinary, and reproductive. discuss the function of neurons, the brain and the spinal cord within the human nervous system while explaining the interrelationship of each organ.

Which type of respiration takes place when there is no oxygen present? a. anaerobic b. mitochondrial c. cellular d. aerobica. anaerobic