Question

1.
Define the following:
a. Organ b. Organ system
c. Capillaries d. Heartbeat​

Answer 1

$\huge\mathfrak\red{Organ}$

a group of tissues in a living organism that have been adapted to perform a specific function

$\huge\mathfrak\red{Organ\: System}$

an organ system is a group of organs that work together to perform one or more functions. Each does a particular job in the body, and is made up of certain tissues.

$\huge\mathfrak\red{Capillaries}$

Capillaries are the smallest of blood vessels. They serve to distribute oxygenated blood from arteries to the tissues of the body and to feed deoxygenated blood from the tissues back into the veins. The capillaries are thus a central component in the circulatory system, essentially between the arteries and the veins.

$\huge\mathfrak\red{Heartbeat}$

one complete pulsation of the heart