Human Tissues
A tissue is a group of cells that work together to do the same thing in a body.
Sponges are the simplest multicellular animals. They are made up of many different types of
cells that all work together to do one thing. Such cell types include stomach cells, tubular pore
cells, and epidermal cells. Even though the different cell types work together to make the visible
sponge, which is a big, organized structure made up of many cells, they are not organized into
true tissues. If you put a sponge through a sieve and break it up, it will come back together on the
other side.
Tissue level structure is found in things like jellyfish, coral, and sea anemones that are more
complicated. Jellyfish, for example, have different tissues that guard, digest, and sense their
environment.
TYPES OF HUMAN TISSUES
In the bodies of all animals, including humans, there are four main types of cells. All the organs,
bones, and other parts of the body are made up of these. There are four main types of tissues:
epithelium, muscular, nervous, and connective.
Epithelial tissue is made up of layers of tightly packed cells that cover the outside of the body.
The skin, which is also the biggest organ in the body, has the most epithelial tissue. The skin of
mammals is made up of stratified epithelium, which is made up of many layers of cells.
The cells in the top layer, called squamous cells, are flat and shaped like plates. The cells in the
next layer down, called cuboidal cells, are roughly cube-shaped.
WHAT EPITHELIAL TISSUE DOES.
Its main jobs are to protect, soak up, and release. As you probably already know, our skin is an
organ that covers our whole body and keeps bacteria, chemicals, and other things from hurting
the cells underneath. Epithelial cells also line the small intestine, where they absorb nutrients,
and similar cells in the glands release enzymes and hormones.
A tissue is a group of cells that work together to do the same thing in a body.
Sponges are the simplest multicellular animals. They are made up of many different types of
cells that all work together to do one thing. Such cell types include stomach cells, tubular pore
cells, and epidermal cells. Even though the different cell types work together to make the visible
sponge, which is a big, organized structure made up of many cells, they are not organized into
true tissues. If you put a sponge through a sieve and break it up, it will come back together on the
other side.
Tissue level structure is found in things like jellyfish, coral, and sea anemones that are more
complicated. Jellyfish, for example, have different tissues that guard, digest, and sense their
environment.
TYPES OF HUMAN TISSUES
In the bodies of all animals, including humans, there are four main types of cells. All the organs,
bones, and other parts of the body are made up of these. There are four main types of tissues:
epithelium, muscular, nervous, and connective.
Epithelial tissue is made up of layers of tightly packed cells that cover the outside of the body.
The skin, which is also the biggest organ in the body, has the most epithelial tissue. The skin of
mammals is made up of stratified epithelium, which is made up of many layers of cells.
The cells in the top layer, called squamous cells, are flat and shaped like plates. The cells in the
next layer down, called cuboidal cells, are roughly cube-shaped.
WHAT EPITHELIAL TISSUE DOES.
Its main jobs are to protect, soak up, and release. As you probably already know, our skin is an
organ that covers our whole body and keeps bacteria, chemicals, and other things from hurting
the cells underneath. Epithelial cells also line the small intestine, where they absorb nutrients,
and similar cells in the glands release enzymes and hormones.
