The muscular system is composed of approximately how many skeletal muscles.

The amount of oxygen that is actually used by the body during the rest or a hand workout is determined by the heart rate, the stroke volume, and the amount of a. blood circulating in the vascular system b. oxygen removed from the vascular system c. oxygen provided to the vascular system d. blood that individual has in the body e. hemoglobin in the red blood cells

Akey feature of all epidemiology is the definition of a at risk. select one: a. pathogen b. ethnicity c. population d. lifestyle e. insect

For my health class we were given a bunch of pictures of pregnancy tests for extra credit we have to say if they’re negative or positive. i can’t tell if this is a shadow or if it’s a faint positive