Question

2. ‘Tissues combine to form organs’ . Considering intestine as example, justify the statement.​

Answer 1

The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems.

Different systems of the body carry out different functions. For example, your digestive system is responsible for taking in and processing food, while your respiratory system—working with your circulatory system—is responsible for taking up oxygen and getting rid of carbon dioxide. The muscular and skeletal systems are crucial for movement; the reproductive system handles reproduction; and the excretory system gets rid of metabolic waste.

Because of their specialization, these different systems are dependent on each other. The cells that make up the digestive, muscular, skeletal, reproductive, and excretory systems all need oxygen from the respiratory system to function, and the cells of the respiratory system—as well as all the other systems—need nutrients and must get rid of metabolic wastes. All the systems of the body work together to keep an organism up and running.

Answer 2

Explanation:

Tissue is a group of cells which are identical in structure and performs similar functions. There are basically four types of tissues that are as follows.

1. Connective Tissue
2. Epithelial Tissue
3. Muscle Tissue
4. Nervous Tissue

Organ is a group of tissues that are identical in structure and perform similar functions.

Example: Heart, Kidneys

"Tissue combine to form organs."

Example: The intestine and stomach have a simple columnar epithelium layer for various processes like secretion and absorption. The large intestine is made of four tissue layers. The innermost layer is called mucosa which is a simple columnar epithelium tissue. After mucosa, there is a layer called submucosa which surrounds the mucosal layer and is a connective tissue. After submucosa, there is a layer called muscularis which surrounds submucosa and fourth layer is called serosa which is the outermost layer and is a simple squamous epithelium tissue.

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