Biology, asked by sonikashish919, 1 month ago

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Explain Different types of animal tissues
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Answers

Answered by officiallysyco
1

Explanation:

Animal Tissues

A tissue is a group of connected cells that have a similar function within an organism.

There are four basic types of tissue in the body of all animals, including the human body. These make up all the organs, structures and other contents of the body. figure below shows an example of each tissue type.

The four basic types of animal tissue are:

Epithelial tissue is made up of layers of tightly packed cells that line the surfaces of the body for protection, secretion, and absorption. Examples of epithelial tissue include the skin, the lining of the mouth and nose, and the lining of the digestive system.

Muscle tissue is made up of cells contain contractile filaments that move past each other and change the size of the cell. There are three types of muscle tissue: smooth muscle which is found in the inner linings of organs; skeletal muscle, which is attached to bone and moves the body; and cardiac muscle which is found only in the heart.

Nervous tissue is made up of the nerve cells (neurons) that together form the nervous system, including the brain and spinal cord.

Connective tissue is made up of many different types of cells that are all involved in structure and support of the body. Bone, blood, fat, and cartilage are all connective tissues. Connective tissue can be densely packed together, as bone cells are, or loosely packed, as adipose tissue (fat cells) are.

Epithelial Tissue

1. They cover the body, organs, blood vessels and all body cavities.

2. The cells are thin and lower most layer rest in a basement membrane.

3. Basically protective. Could be secretory and absorptive in function.

Types: They are of two types.

1. Simple (made up of one layer of cells) and

2. Stratified (made up of number of layers of cells)

1. Simple:

i) Simple epithelium: Made up of one layer of cells. Depending on the shape of cells, it could be of following types.

ii) Simple suamous epithelium: Made up of thin, flattened cells. Form lining of mouth, lungs and capillaries. Allow exchange of gases and materials.

iii) Simple cuboidal epithelium: Made up of cube like cells. Present in kidney tubules. Secretory and absorptive in function.

iv) Simple columnar epithelium: Made up of long column-like cells with generally nuclei at the base. Present in the lining of stomach, intestine, salivary glands. Secretory and absorptive in function.

2. Stratified epithelium: Made up of number of layers of cells. Covers the body. Protective in function.

What exactly are muscles?

Does the word “muscle” make you think of the biceps of a weightlifter, like the man in pictured above? Muscles such as biceps that move the body are easy to feel and see, but they aren’t the only muscles in the human body. Many muscles are deep within the body. They form the walls of internal organs such as the heart and stomach. You can flex your biceps like a body builder, but you cannot control the muscles inside you. It’s a good thing that they work on their own without any conscious effort on your part, because movement of these muscles is essential for survival.

What Are Muscles?

The muscular system consists of all the muscles of the body. Muscles are organs composed mainly of muscle cells, which are also called muscle fibers. Each muscle fiber is a very long, thin cell that can do something no other cell can do. It can contract, or shorten. Muscle contractions are responsible for virtually all the movements of the body, both inside and out. There are three types of muscle tissues in the human body: cardiac, smooth, and skeletal muscle tissues.

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