Question

PLEASE HURRY WILL MARK AS BRAIANLEST

Which is an organ?
1.)heart
2.)circulatory system
3.)blood
4.)muscle tissue

Answer 1

A.) heart

Step-by-step explanation:

Your heart is actually a muscular organ. An organ is a group of tissues that work together to perform a specific function. In the case of your heart, this function is pumping blood throughout your body. Additionally, the heart is largely made up of a type of muscle tissue called cardiac muscle.

Answer 2

1) Heart

Step-by-step explanation:

Because it is a self-contained group of tissues that performs a specific function in the body.