Write the types of animals tissues with their location and function
Answers
Answer:
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.
Explanation:
3.1 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.
3.2 Muscular Tissue
Smooth, Skeletal, and Cardiac Muscles
Types of Muscle Tissue. Both skeletal and cardiac muscles appear striated, or striped, because their cells are arranged in bundles. Smooth muscles are not striated because their cells are arranged in sheets instead of bundles.
Smooth Muscle
Muscle tissue in the walls of internal organs such as the stomach and intestines is smooth muscle. When smooth muscle contracts, it helps the organs carry out their functions. For example, when smooth muscle in the stomach contracts, it squeezes the food inside the stomach, which helps break the food into smaller pieces. Contractions of smooth muscle are involuntary. This means they are not under conscious control.
Skeletal Muscle
Muscle tissue that is attached to bone is skeletal muscle. Whether you are blinking your eyes or running a marathon, you are using skeletal muscle. Contractions of skeletal muscle are voluntary, or under conscious control. Skeletal muscle is the most common type of muscle in the human body.
Cardiac Muscle
Cardiac muscle is found only in the walls of the heart. When cardiac muscle contracts, the heart beats and pumps blood. Cardiac muscle contains a great many mitochondria, which produce ATP for energy. This helps the heart resist fatigue. Contractions of cardiac muscle are involuntary, like those of smooth muscle. Cardiac muscle, like skeletal muscle, is arranged in bundles, so it appears striated, or striped.
2 Types of Muscle Tissue
Connective Tissue
Connective tissues are made up of fibrous cells. Blood and Bone are good examples of specialized connective tissues. The cells of the connective tissue are separated by non-living material called extracellular matrix. These tissues help to hold other tissues together like during the formation of organs and have the ability to stretch and contract positively.
Nervous Tissue
The cell body contains the nucleus and other cell organelles.
Dendrites extend from the cell body and receive nerve impulses from other neurons.
The axon is a long extension of the cell body that transmits nerve impulses to other cells. The axon branches at the end, forming axon terminals. These are the points where the neuron communicates with other cells.