Anatomy Physiology and Biology (Grade A+)

Summary:

The Anatomy Physiology and Biology note discusses two types of tissues: epithelial and connective. Epithelial tissue covers and lines body cavities, vessels, and organs and can be classified based on the number of cell layers and cell shape. Connective tissue supports and binds other tissues and organs; its components include ground substances, fibres, and cells. The four types of connective tissue are connective tissue proper, cartilage, bone, and blood. Each type has unique features, functions, and subcategories. Muscle and nervous tissues will be discussed in a later article.

Excerpt:

Anatomy Physiology and Biology

TYPES OF TISSUES: EPITHELIAL AND CONNECTIVE

Epithelial tissues

When learning about the human body, there is so much to talk about that it can be difficult to know where to
start, But the best place to begin will be an overview of the types of tissues that can be found. Tissues are
collections of cells that are similar in structure and perform a common or related function. This is a very important feature in any multicellular organism because something like a human being contains trillions of cells. If they were all the same, we could not be so complex, so it is the fact that cells can become specialized that allows for the sophisticated appearance and behaviour of a human. It will be extremely important to recognize different types of tissues and know their features because every part of the body we will be looking at will be made of different combinations of these types of tissues, so let’s go through a survey of these now.

We will be looking at four types of tissue altogether, and those are epithelial tissue, connective tissue,
nervous tissue, and muscle tissue. Let’s start with epithelial tissue. In short, this is the tissue that covers things,
including our entire body. The outer layer of our skin is made of epithelial tissue. This tissue also dips into body
cavities, covering the digestive and respiratory systems, and it even lines blood vessels and various organs. All of
this can be considered covering and lining epithelium, which acts as boundaries, and any substance that enters
or exits the body must pass through some kind of epithelium.