I need help with add maths

Amuscle that doesn’t need to be exercised regularly is your heart true or false ?

The cardiovascular system, which transports blood through the body, is a one-way system. select the best answer from the choices provided. t f

Every person’s body is different, a. but every vehicle’s cabin layout is the same b. and every vehicle’s cabin layout is different c. making some people automatically safe drivers d. making some people better fit to drive a sedan than a coupe