Video Transcript
This picture shows heart muscle
tissue under a microscope. What is the tissue made of? Is it cells, organs, or blood?
To answer this question, we first
have to define what tissue is. Specialized cells that are grouped
together for a specific function or job are called tissues. Examples of tissues are muscle
tissue and nervous tissue. Muscle tissue exists in our
muscles, and nervous tissue exists in our brains. So, to recap, you have cells, for
example, a muscle cell. When groups of these cells come
together for a specific function, you have tissue, for example, muscle tissue. When tissues are grouped together
for a specific function, you have organs, for example, the heart. And when organs are grouped
together for a specific role or function, you have organ systems, for example, the
muscular system. This organ system is one for a
chicken. Could you guess?
Anyway, to return to tissues, organ
systems are always made up of organs. Organs are always made up of
tissue, and tissue is always made up of cells. Knowing this, let’s return back to
our question. Well, we know from our diagram that
tissue is always made up of cells. The first answer is cells, so this
looks like it must be correct. But let’s check the other ones just
to make sure. (B) is organs. But organs are made up of
tissue. So this answer can’t be
correct. Finally, we have blood, which is a
collection of blood cells, is actually also an example of a tissue. So seeing that blood is a tissue
itself and muscle tissue must be made up of cells, that means that blood also can’t
be the correct answer.
Therefore, the answer to “This
picture shows heart muscle tissue under a microscope. What is the tissue made of?” must
be “cells.”
