Most of the exchange surfaces of multicellular animals are lined with epithelial tissue.
Epithelial tissue is one of the four major body tissues found in organs, lining the internal and external surfaces of the body.
It has different structures and functions depending on where it is located on the body.
The epithelium is a type of body tissue that covers all the internal and external surfaces of the body, lines body cavities and hollow organs.
Epithelial tissue has various functions, such as protection, secretion, and absorption, depending on where it is located in the body. The body organs are made up of four basic types of tissue, including:
- Epithelial tissue
- Connective tissue
- Muscular tissue
- Nervous tissue
All substances entering or leaving an organ must first pass through the epithelium.
There are various types of epithelial tissue throughout the body. Some examples of epithelial tissues are:
- The outer layer of skin (epidermis).
- Intestinal mucosa.
- Airway lining.
- Inner wall of abdominal cavity.
- Sweat glands
Learn more about Epithelial tissue here : brainly.com/question/17301113
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Answer:
Nervous system
Explanation:
The nervous system in humans work together to collect information about the external environment because they consist of the brain, spinal cords and neurons. They collect information from external environment and those information travels through neurons from sense organs like eyes, ears, skin e.t.c as a form of electrical impulses. When they get to the end of the neuron, a chemical called neurotransmitters are released which travels across the cells and send it to the brain, the brain then process it and interprete the signals and respond to it as stimulus.
1-2 days before it needs its light for vitamin D
